ASSIGNMENT AND ASSUMPTION AGREEMENT
        ASSIGNMENT  AND  ASSUMPTION  AGREEMENT,  dated April 27,  2006,  between
Residential Funding Corporation,  a Delaware corporation ("RFC") and Residential
Funding Mortgage Securities I, Inc., a Delaware corporation (the "Company").
                                    Recitals
        I. RFC has entered  into  contracts  ("Seller  Contracts")  with various
seller/servicers,  pursuant to which such  seller/servicers sell to RFC mortgage
loans.
        II. The Company  wishes to purchase from RFC certain  Mortgage Loans (as
hereinafter defined) sold to RFC pursuant to the Seller Contracts.
        III.  The  Company,  RFC,  as master  servicer  and U.S.  Bank  National
Association,  as trustee (the "Trustee"), are entering into a Series Supplement,
dated as of April 1, 2006 (the "Series  Supplement"),  to the Standard  Terms of
Pooling and Servicing Agreement,  dated as of January 1, 2006 (together with the
Series Supplement, the "Pooling and Servicing Agreement"), pursuant to which the
Company  proposes to issue Mortgage  Pass-Through  Certificates,  Series 2006-S4
(the  "Certificates")  consisting of classes  designated as the Class A-1, Class
A-2,  Class A-3,  Class A-4,  Class A-5,  Class A-6, Class A-7, Class A-8, Class
A-9, Class A-10,  Class A-V,  Class A-P,  Class R-I and Class R-II  Certificates
(collectively,  the "Senior  Certificates"),  Class M-1, Class M-2 and Class M-3
Certificates (collectively, the "Class M Certificates") and Class B-1, Class B-2
and  Class  B-3  Certificates   (collectively,   the  "Class  B  Certificates"),
representing beneficial ownership interests in a trust fund consisting primarily
of a pool of mortgage loans  identified in Exhibit One to the Series  Supplement
(the "Mortgage Loans").
        IV. In connection with the purchase of the Mortgage  Loans,  the Company
will assign to RFC the Class A-P  Certificates,  Class A-V Certificates and a de
minimis  portion  of each of the  Class  R-I and Class  R-II  Certificates  (the
"Retained Certificates").
        V. In  connection  with  the  purchase  of the  Mortgage  Loans  and the
issuance of the  Certificates,  RFC wishes to make certain  representations  and
warranties  to the Company and to assign  certain of its rights under the Seller
Contracts  to the  Company,  and the Company  wishes to assume  certain of RFC's
obligations under the Seller Contracts.
        VI. The Company and RFC intend that the conveyance by RFC to the Company
of all its right,  title and interest in and to the Mortgage  Loans  pursuant to
this Agreement shall constitute a purchase and sale and not a loan.
        NOW THEREFORE,  in consideration of the recitals and the mutual promises
herein and other good and valuable consideration, the parties agree as follows:
Section 1. All  capitalized  terms used but not  defined  herein  shall have the
meanings assigned thereto in the Pooling and Servicing Agreement.
Section 2.  Concurrently  with the  execution  and delivery  hereof,  RFC hereby
assigns to the Company without recourse all of its right,  title and interest in
and to the Mortgage Loans,  including all interest and principal  received on or
with respect to the Mortgage  Loans after April 1, 2006 (other than  payments of
principal  and  interest  due  on  the  Mortgage   Loans  in  April  2006).   In
consideration  of such  assignment,  RFC or its  designee  will receive from the
Company in immediately  available funds an amount equal to $310,479,270.71  plus
the Class A-P Certificates,  the Class A-V Certificates and a de minimis portion
of the Retained  Certificates.  In connection  with such  assignment  and at the
Company's  direction,  RFC has in respect of each  Mortgage  Loan  endorsed  the
related  Mortgage Note (other than any Destroyed  Mortgage Note) to the order of
the Trustee and delivered an  assignment  of mortgage in recordable  form to the
Trustee or its agent.  A  "Destroyed  Mortgage  Note" means a Mortgage  Note the
original of which was permanently lost or destroyed.
        RFC and the  Company  agree  that the sale of each  Pledged  Asset  Loan
pursuant  to  this  Agreement  will  also  constitute  the   assignment,   sale,
setting-over,  transfer and  conveyance  to the Company,  without  recourse (but
subject to RFC's covenants, representations and warranties specifically provided
herein),  of all of RFC's obligations and all of RFC's right, title and interest
in, to and under,  whether now existing or  hereafter  acquired as owner of such
Pledged  Asset  Loan with  respect to any and all  money,  securities,  security
entitlements,  accounts, general intangibles, payment intangibles,  instruments,
documents, deposit accounts, certificates of deposit, commodities contracts, and
other  investment  property and other  property of whatever kind or  description
consisting  of,  arising  from or  related  to, (i) the  Credit  Support  Pledge
Agreement,  the Funding and Pledge Agreement among the Mortgagor or other Person
pledging the related Pledged Assets (the  "Customer"),  Combined  Collateral LLC
and National  Financial  Services  Corporation,  and the  Additional  Collateral
Agreement between GMAC Mortgage Corporation and the Customer (collectively,  the
"Assigned  Contracts"),  (ii) all rights, powers and remedies of RFC as owner of
such Pledged  Asset Loan under or in  connection  with the  Assigned  Contracts,
whether arising under the terms of such Assigned  Contracts,  by statute, at law
or in equity,  or otherwise arising out of any default by the Mortgagor under or
in connection with the Assigned Contracts,  including all rights to exercise any
election  or  option  or to make any  decision  or  determination  or to give or
receive any notice,  consent,  approval or waiver thereunder,  (iii) the Pledged
Amounts and all money,  securities,  security  entitlements,  accounts,  general
intangibles,  payment  intangibles,  instruments,  documents,  deposit accounts,
certificates of deposit,  commodities  contracts,  and other investment property
and other  property of whatever kind or  description  and, all cash and non-cash
proceeds of the sale,  exchange,  or redemption  of, and all stock or conversion
rights,  rights  to  subscribe,  liquidation  dividends  or  preferences,  stock
dividends,  rights to interest,  dividends,  earnings,  income,  rents,  issues,
profits, interest payments or other distributions of cash or other property that
secures a Pledged Asset Loan, (iv) all documents,  books and records  concerning
the foregoing  (including all computer programs,  tapes, disks and related items
containing  any such  information)  and (v) all  insurance  proceeds  (including
proceeds  from the  Federal  Deposit  Insurance  Corporation  or the  Securities
Investor  Protection  Corporation or any other insurance  company) of any of the
foregoing  or  replacements  thereof  or  substitutions  therefor,  proceeds  of
proceeds and the  conversion,  voluntary  or  involuntary,  of any thereof.  The
foregoing transfer,  sale,  assignment and conveyance does not constitute and is
not intended to result in the creation,  or an assumption by the Company, of any
obligation of RFC, or any other Person in connection  with the Pledged Assets or
under any agreement or instrument relating thereto,  including any obligation to
the Mortgagor, other than as owner of the Pledged Asset Loan.
        The Company and RFC intend that the  conveyance by RFC to the Company of
all its right,  title and interest in and to the Mortgage Loans pursuant to this
Section 2 shall be, and be construed as, a sale of the Mortgage  Loans by RFC to
the Company. It is, further, not intended that such conveyance be deemed to be a
pledge of the  Mortgage  Loans by RFC to the  Company  to secure a debt or other
obligation of RFC. However,  in the event that the Mortgage Loans are held to be
property of RFC, or if for any reason this Agreement is held or deemed to create
a security  interest in the Mortgage  Loans,  then it is intended  that (a) this
Agreement shall be a security  agreement  within the meaning of Articles 8 and 9
of the Minnesota Uniform  Commercial Code and the Uniform Commercial Code of any
other applicable  jurisdiction;  (b) the conveyance provided for in this Section
shall be  deemed  to be,  and  hereby  is, a grant  by RFC to the  Company  of a
security interest in all of RFC's right,  title and interest,  whether now owned
or  hereafter  acquired,  in and to any and  all  general  intangibles,  payment
intangibles,  accounts,  chattel paper, instruments,  documents,  money, deposit
accounts,  certificates of deposit,  goods, letters of credit, advices of credit
and  investment  property  consisting of, arising from or relating to any of the
following:   (A)  the  Mortgage  Loans,  including  (i)  with  respect  to  each
Cooperative Loan, the related Mortgage Note, Security  Agreement,  Assignment of
Proprietary  Lease,  Cooperative  Stock  Certificate,   Cooperative  Lease,  any
insurance policies and all other documents in the related Mortgage File and (ii)
with respect to each Mortgage Loan other than a  Cooperative  Loan,  the related
Mortgage Note, the Mortgage,  any insurance  policies and all other documents in
the related  Mortgage  File, (B) all monies due or to become due pursuant to the
Mortgage Loans in accordance  with the terms thereof and (C) all proceeds of the
conversion,  voluntary or involuntary,  of the foregoing into cash, instruments,
securities or other property, including without limitation all amounts from time
to time held or invested in the  Certificate  Account or the Custodial  Account,
whether in the form of cash, instruments,  securities or other property; (c) the
possession  by the Trustee,  the  Custodian or any other agent of the Trustee of
Mortgage Notes or such other items of property as constitute instruments, money,
payment intangibles,  negotiable documents,  goods, deposit accounts, letters of
credit,  advices of credit investment  property or chattel paper shall be deemed
to be possession by the secured party,  or possession by a purchaser or a person
designated  by such  secured  party,  for  purposes of  perfecting  the security
interest  pursuant  to the  Minnesota  Uniform  Commercial  Code and the Uniform
Commercial  Code  of  any  other  applicable  jurisdiction  (including,  without
limitation,  Sections 8-106, 9-313 and 9-106 thereof);  and (d) notifications to
persons holding such property,  and  acknowledgments,  receipts or confirmations
from  persons  holding  such  property,  shall be  deemed  notifications  to, or
acknowledgments  receipts  or  confirmations  from,  securities  intermediaries,
bailees or agents of, or persons holding for (as applicable) the Trustee for the
purpose of perfecting such security interest under applicable law. RFC shall, to
the extent consistent with this Agreement,  take such reasonable  actions as may
be necessary to ensure  that,  if this  Agreement  were  determined  to create a
security interest in the Mortgage Loans and the other property  described above,
such security  interest would be determined to be a perfected  security interest
of first priority under applicable law and will be maintained as such throughout
the term of this  Agreement.  Without  limiting the generality of the foregoing,
RFC shall  prepare and deliver to the Company not less than 15 days prior to any
filing  date,  and the Company  shall file,  or shall cause to be filed,  at the
expense of RFC,  all filings  necessary  to maintain  the  effectiveness  of any
original filings necessary under the Uniform Commercial Code as in effect in any
jurisdiction  to  perfect  the  Company's  security  interest  in or lien on the
Mortgage Loans,  including without limitation (x) continuation  statements,  and
(y) such other  statements as may be occasioned by (1) any change of name of RFC
or the Company, (2) any change of location of the place of business or the chief
executive  office of RFC or,  (3) any  transfer  of any  interest  of RFC in any
Mortgage Loan.
        Notwithstanding the foregoing,  (i) the Master Servicer shall retain all
servicing rights (including,  without  limitation,  primary servicing and master
servicing)  relating to or arising out of the Mortgage Loans,  and all rights to
receive servicing fees, servicing income and other payments made as compensation
for such  servicing  granted to it under the  Pooling  and  Servicing  Agreement
pursuant  to the  terms and  conditions  set forth  therein  (collectively,  the
"Servicing  Rights")  and (ii) the  Servicing  Rights  are not  included  in the
collateral in which RFC grants a security  interest  pursuant to the immediately
preceding paragraph.
Section 3.  Concurrently  with the  execution and delivery  hereof,  the Company
hereby assigns to RFC without  recourse all of its right,  title and interest in
and to the Class A-P and Class A-V  Certificates and a de minimis portion of the
Retained Certificates as part of the consideration payable to RFC by the Company
pursuant to this Agreement.
Section  4. RFC  represents  and  warrants  to the  Company  that on the date of
execution  hereof  (or,  if  otherwise  specified  below,  as  of  the  date  so
specified):
(i) The  information  set forth in  Exhibit  One to the Series  Supplement  with
respect to each Mortgage Loan or the Mortgage Loans, as the case may be, is true
and correct,  in all material  respects,  at the date or dates  respecting which
such information is furnished;
(ii) Each mortgage loan with a  Loan-to-Value  Ratio at origination in excess of
80%,  will be  insured  by a  primary  mortgage  insurance  policy  (a  "Primary
Insurance  Policy")  covering  at  least  30% of the  principal  balance  of the
Mortgage Loan at  origination if the  Loan-to-Value  Ratio is between 95.00% and
90.01%,  at least 25% of the balance of the mortgage loan at  origination if the
Loan-to-Value  Ratio is  between  90.00%  and  85.01%,  and at least  12% of the
balance  of the  mortgage  loan at  origination  if the  Loan-to-Value  Ratio is
between  85.00% and 80.01%.  To the best of the Company's  knowledge,  each such
Primary Insurance Policy is in full force and effect and the Trustee is entitled
to the benefits thereunder;
(iii) Each Primary Insurance Policy insures the named insured and its successors
and  assigns,  and the issuer of the Primary  Insurance  Policy is an  insurance
company  whose  claims-paying  ability  is  currently  acceptable  to the Rating
Agencies;
(iv)  Immediately  prior to the assignment of the Mortgage Loans to the Company,
RFC had good title to, and was the sole owner of,  each  Mortgage  Loan free and
clear of any pledge,  lien,  encumbrance or security interest (other than rights
to servicing  and related  compensation  and,  with respect to certain  Mortgage
Loans,  the  monthly  payment  due on the first Due Date  following  the Cut-off
Date),  and no action  has been  taken or  failed to be taken by RFC that  would
materially  adversely  affect the  enforceability  of any  Mortgage  Loan or the
interests therein of any holder of the Certificates;
(v) No Mortgage Loan was 30 or more days  delinquent in payment of principal and
interest as of the Cut-off Date and no Mortgage Loan has been so delinquent more
than once in the 12-month period prior to the Cut-off Date;
(vi) Subject to clause (v) above as respects delinquencies, there is no default,
breach,  violation or event of acceleration  existing under any Mortgage Note or
Mortgage and no event  which,  with notice and  expiration  of any grace or cure
period, would constitute a default,  breach, violation or event of acceleration,
and no such default,  breach, violation or event of acceleration has been waived
by the Seller or by any other  entity  involved in  originating  or  servicing a
Mortgage Loan;
(vii) There is no  delinquent  tax or  assessment  lien  against  any  Mortgaged
Property;
(viii) No Mortgagor has any right of offset,  defense or  counterclaim as to the
related  Mortgage  Note  or  Mortgage  except  as  may  be  provided  under  the
Servicemembers Civil Relief Act;
(ix) None of the Mortgage Loans are Buy-Down Mortgage Loans;
(x)  There  are no  mechanics'  liens or  claims  for  work,  labor or  material
affecting any Mortgaged  Property  which are or may be a lien prior to, or equal
with,  the lien of the related  Mortgage,  except such liens that are insured or
indemnified  against by a title  insurance  policy  described  under clause (xv)
below;
(xi) Each Mortgaged  Property is free of damage and in good repair and no notice
of  condemnation  has been given with  respect  thereto and RFC knows of nothing
involving any Mortgaged Property that could reasonably be expected to materially
adversely affect the value or marketability of any Mortgaged Property;
(xii)  Each  Mortgage  Loan at the time it was  made  complied  in all  material
respects with all applicable local, state and federal laws,  including,  but not
limited to, all applicable anti-predatory lending laws;
(xiii) Each Mortgage contains customary and enforceable  provisions which render
the rights and  remedies of the holder  adequate to realize the  benefits of the
security against the Mortgaged Property, including (i) in the case of a Mortgage
that is a deed of trust,  by trustee's  sale,  (ii) by summary  foreclosure,  if
available under applicable law, and (iii) otherwise by foreclosure, and there is
no homestead or other exemption  available to the Mortgagor that would interfere
with such right to sell at a trustee's sale or right to foreclosure,  subject in
each case to  applicable  federal and state laws and  judicial  precedents  with
respect to bankruptcy and right of redemption;
(xiv) With  respect to each  Mortgage  that is a deed of trust,  a trustee  duly
qualified under  applicable law to serve as such is properly  named,  designated
and serving,  and except in connection  with a trustee's sale after default by a
Mortgagor,  no fees or expenses  are payable by the Seller or RFC to the trustee
under any Mortgage that is a deed of trust;
(xv) A policy of title  insurance in the form and amount required by the Program
Guide was  effective  as of the  closing  of each  Mortgage  Loan,  is valid and
binding and remains in full force and effect,  unless the  Mortgaged  Properties
are located in the State of Iowa and an attorney's certificate has been provided
as described in the Program Guide;
(xvi)  The  Mortgage  Loans  are  conventional,  fixed  rate,  fully-amortizing,
(subject to interest  only periods,  if  applicable)  first lien mortgage  loans
having terms to maturity of not more than 30 years, from the date of origination
or  modification  with monthly  payments  due, with respect to a majority of the
Mortgage Loans, on the first day of each month;
(xvii) No Mortgage Loan provides for deferred interest or negative amortization;
(xviii) The improvements upon the Mortgaged  Properties are insured against loss
by fire and other  hazards as  required  by the Program  Guide  including  flood
insurance  if  required  under the  National  Flood  Insurance  Act of 1968,  as
amended. The Mortgage requires the Mortgagor to maintain such casualty insurance
at the Mortgagor's  expense,  and on the Mortgagor's failure to do so, authorize
the  holder of the  Mortgage  to  obtain  and  maintain  such  insurance  at the
Mortgagor's expense and to seek reimbursement therefore from the Mortgagor;
(xix) If any of the  Mortgage  Loans are secured by a leasehold  interest,  with
respect to each leasehold interest: the use of leasehold estates for residential
properties  is an  accepted  practice  in the area where the  related  Mortgaged
Property is located;  residential  property in such area consisting of leasehold
estates is readily marketable;  the lease is recorded and no party is in any way
in breach of any  provision  of such lease;  the  leasehold is in full force and
effect  and is not  subject  to any  prior  lien or  encumbrance  by  which  the
leasehold  could be  terminated  or subject to any  charge or  penalty;  and the
remaining  term of the lease does not  terminate  less than ten years  after the
maturity date of such Mortgage Loan;
(xx) Each  Assigned  Contract  relating to each  Pledged  Asset Loan is a valid,
binding and legally enforceable  obligation of the parties thereto,  enforceable
in accordance with their terms,  except as limited by bankruptcy,  insolvency or
other similar laws affecting generally the enforcement of creditor's rights;
(xxi) The  Assignor  is the holder of all of the right,  title and  interest  as
owner  of each  Pledged  Asset  Loan in and to  each of the  Assigned  Contracts
delivered and sold to the Company  hereunder,  and the assignment  hereof by RFC
validly  transfers such right,  title and interest to the Company free and clear
of any pledge, lien, or security interest or other encumbrance of any Person;
(xxii) The full amount of the Pledged  Amount with respect to such Pledged Asset
Mortgage Loan has been  deposited  with the custodian  under the Credit  Support
Pledge  Agreement and is on deposit in the custodial  account held thereunder as
of the date hereof;
(xxiii) RFC is a member of MERS, in good standing, and current in payment of all
fees and  assessments  imposed  by MERS,  and has  complied  with all  rules and
procedures of MERS in connection  with its assignment to the Trustee as assignee
of the Company of the Mortgage relating to each Mortgage Loan that is registered
with MERS,  including,  among other  things,  that RFC shall have  confirmed the
transfer to the  Trustee,  as assignee of the  Company,  of the  Mortgage on the
MERS(R) System;
(xxiv) No instrument  of release or waiver has been executed in connection  with
the Mortgage Loans, and no Mortgagor has been released, in whole or in part from
its obligations in connection with a Mortgage Loan;
(xxv) With  respect to each  Mortgage  Loan,  either  (i) the  Mortgage  Loan is
assumable  pursuant to the terms of the Mortgage  Note or (ii) the Mortgage Loan
contains a customary provision for the acceleration of the payment of the unpaid
principal  balance  of the  Mortgage  Loan in the  event the  related  Mortgaged
Property is sold without the prior consent of the mortgagee thereunder;
(xxvi) The proceeds of the Mortgage Loan have been fully disbursed,  there is no
requirement  for future advances  thereunder and any and all  requirements as to
completion of any on-site or off-site  improvements  and as to  disbursements of
any escrow  funds  therefor  (including  any escrow  funds held to make  Monthly
Payments pending  completion of such  improvements) have been complied with. All
costs, fees and expenses  incurred in making,  closing or recording the Mortgage
Loans were paid;
(xxvii)  The   appraisal  was  made  by  an  appraiser  who  meets  the  minimum
qualifications for appraisers as specified in the Program Guide;
(xxviii) To the best of RFC's  knowledge,  any escrow  arrangements  established
with respect to any Mortgage Loan are in compliance  with all applicable  local,
state and  federal  laws and are in  compliance  with the  terms of the  related
Mortgage Note;
(xxix) Each Mortgage Loan was originated (1) by a savings and loan  association,
savings  bank,  commercial  bank,  credit  union,  insurance  company or similar
institution that is supervised and examined by a federal or state authority, (2)
by a mortgagee approved by the Secretary of HUD pursuant to Sections 203 and 211
of  the  National  Housing  Act,  as  amended  or (3) by a  mortgage  broker  or
correspondent  lender in a manner such that the  Certificates  would  qualify as
"mortgage  related  securities"  within the  meaning of Section  3(a)(41) of the
Securities Exchange Act of 1934, as amended;
(xxx) All improvements  which were considered in determining the Appraised Value
of the Mortgaged  Properties  lie wholly within the  boundaries and the building
restriction lines of the Mortgaged Properties,  or the policy of title insurance
affirmatively  insures  against  loss or  damage  by  reason  of any  violation,
variation,  encroachment  or adverse  circumstance  that either is  disclosed or
would have been disclosed by an accurate survey;
(xxxi) Each  Mortgage Note and Mortgage  constitutes a legal,  valid and binding
obligation of the Borrower  enforceable  in accordance  with its terms except as
limited by bankruptcy,  insolvency or other similar laws affecting generally the
enforcement of creditor's rights;
(xxxii) None of the Mortgage  Loans are subject to the Home Ownership and Equity
Protection Act of 1994;
(xxxiii) None of the Mortgage Loans are loans that,  under  applicable  state or
local law in effect at the time of  origination  of the loan, are referred to as
(1) "high-cost" or "covered"  loans or (2) any other similar  designation if the
law imposes greater  restrictions or additional  legal liability for residential
mortgage loans with high interest rates, points and/or fees;
(xxxiv) No Mortgage  Loan was  originated on or after October 1, 2002 and before
March 7, 2003, which is secured by property located in the State of Georgia;
(xxxv) No Mortgage Loan is a High Cost Loan or Covered  Loan, as applicable  (as
such terms are defined in the Appendix E of the  Standard & Poor's  Glossary For
File Format For LEVELS(R)  Version 5.6c Revised  (attached hereto as Exhibit A);
provided that no Qualified Substitute Mortgage Loan shall be a High Cost Loan or
Covered Loan (as such terms are defined in Appendix E of the S&P's  Glossary For
File Format For  LEVELS(R)  in effect on the date of  substitution),  unless the
Company shall have received from S&P written  confirmation that the inclusion of
any such  Mortgage  Loan will not  adversely  affect  the then  current  ratings
assigned to any of the Certificates by S&P; and
(xxxvi) Each  mortgage  loan  constitutes  a qualified  mortgage  under  Section
860G(a)(3)(A) of the Code and Treasury Regulations Section 1.860G-2(A)(1).
        RFC shall provide  written  notice to GMAC Mortgage  Corporation  of the
sale of each Pledged  Asset Loan to the Company  hereunder and by the Company to
the Trustee under the Pooling and Servicing  Agreement,  and shall  maintain the
Schedule of Additional  Owner  Mortgage  Loans (as defined in the Credit Support
Pledge  Agreement),  showing  the Trustee as the  Additional  Owner of each such
Pledged  Asset Loan,  all in accordance  with Section 7.1 of the Credit  Support
Pledge Agreement.
        Upon  discovery by RFC or upon notice from the Company or the Trustee of
a breach of the  foregoing  representations  and  warranties  in  respect of any
Mortgage  Loan which  materially  and  adversely  affects the  interests  of any
holders of the  Certificates or of the Company in such Mortgage Loan or upon the
occurrence of a Repurchase Event (hereinafter  defined),  notice of which breach
or  occurrence  shall be given to the Company by RFC, if it discovers  the same,
RFC shall,  within 90 days  after the  earlier  of its  discovery  or receipt of
notice  thereof,  either cure such breach or  Repurchase  Event in all  material
respects  or,  except as  otherwise  provided in Section 2.04 of the Pooling and
Servicing Agreement,  either (i) purchase such Mortgage Loan from the Trustee or
the Company, as the case may be, at a price equal to the Purchase Price for such
Mortgage Loan or (ii) substitute a Qualified  Substitute  Mortgage Loan or Loans
for such Mortgage Loan in the manner and subject to the limitations set forth in
Section  2.04  of  the  Pooling  and  Servicing  Agreement.  If  the  breach  of
representation  and warranty  that gave rise to the  obligation to repurchase or
substitute a Mortgage Loan pursuant to this Section 4 was the representation set
forth in clause  (xii) of this  Section 4, then RFC shall pay to the Trust Fund,
concurrently  with and in addition  to the  remedies  provided in the  preceding
sentence, an amount equal to any liability, penalty or expense that was actually
incurred  and paid out of or on  behalf  of the Trust  Fund,  and that  directly
resulted from such breach, or if incurred and paid by the Trust Fund thereafter,
concurrently with such payment.
Section 5. With respect to each  Mortgage  Loan, a first lien  repurchase  event
("Repurchase  Event") shall have  occurred if it is  discovered  that, as of the
date  thereof,  the related  Mortgage  was not a valid first lien on the related
Mortgaged  Property  subject  only to (i) the lien of real  property  taxes  and
assessments  not  yet  due  and  payable,   (ii)  covenants,   conditions,   and
restrictions,  rights of way, easements and other matters of public record as of
the date of recording of such Mortgage and such permissible  title exceptions as
are listed in the Program Guide and (iii) other matters to which like properties
are commonly subject which do not materially  adversely  affect the value,  use,
enjoyment or marketability of the Mortgaged Property. In addition,  with respect
to any Mortgage Loan listed on the attached Schedule A with respect to which any
document or documents  constituting  a part of the Mortgage  File are missing or
defective  in any  material  respect  as to which the  Company  delivers  to the
Trustee or the Custodian an affidavit certifying that the original Mortgage Note
has been lost or destroyed, if such Mortgage Loan subsequently is in default and
the  enforcement  thereof or of the  related  Mortgage is  materially  adversely
affected by the absence or  defectiveness  of any such  document or documents of
the original  Mortgage Note, a Repurchase Event shall be deemed to have occurred
and RFC will be obligated to repurchase or substitute  for such Mortgage Loan in
the manner set forth in Section 4 above.
Section 6. This Agreement  shall inure to the benefit of and be binding upon the
parties hereto and their respective  successors and assigns, and no other person
shall have any right or obligation hereunder.
                                       [Signature Page Follows]
        IN WITNESS  WHEREOF,  the parties have entered into this  Assignment and
Assumption Agreement on the date first written above.
                                            RESIDENTIAL FUNDING CORPORATION
                                            By:  /s/ ▇▇▇ ▇▇▇▇▇▇▇▇
                                               Name: ▇▇▇ ▇▇▇▇▇▇▇▇
                                               Title:   Associate
                                            RESIDENTIAL FUNDING MORTGAGE
                                            SECURITIES I, INC.
                                            By:   /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
                                               Name: ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
                                               Title:   Vice President
                                    EXHIBIT A
APPENDIX E - STANDARD & POOR'S PREDATORY LENDING CATEGORIES
Standard & Poor's has categorized loans governed by anti-predatory  lending laws
in the Jurisdictions listed below into three categories based upon a combination
of factors  that  include (a) the risk  exposure  associated  with the  assignee
liability and (b) the tests and  thresholds  set forth in those laws.  Note that
certain  loans  classified  by the  relevant  statute as Covered are included in
Standard & Poor's High Cost Loan Category  because they included  thresholds and
tests  that  are  typical  of  what is  generally  considered  High  Cost by the
industry.
                                                                         REVISED July 11, 2005
STANDARD & POOR'S HIGH COST LOAN CATEGORIZATION
------------------------------------------------------------------------------------------------
    State/Jurisdiction           Name of Anti-Predatory Lending            Category under
                                                                             Applicable
                                                                       Anti-Predatory Lending
                                       Law/Effective Date                        Law
---------------------------- ---------------------------------------- --------------------------
                             
Arkansas                     Arkansas  Home  Loan   Protection  Act,  High Cost Home Loan
                             Ark. Code ▇▇▇. ▇▇.▇▇. ▇▇-▇▇-▇▇▇ et seq.
                             Effective July 16, 2003
---------------------------- ---------------------------------------- --------------------------
Cleveland Heights, OH        Ordinance No. 72-2003 (PSH),  Mun. Code  Covered Loan
                             ▇▇.▇▇. 757.01 et seq.
                             Effective June 2, 2003
---------------------------- ---------------------------------------- --------------------------
Colorado                     Consumer   Equity   Protection,   Colo.  Covered Loan
                             Stat. ▇▇▇. ▇▇.▇▇. 5-3.5-101 et seq.
                             Effective for covered loans offered or
                             entered into on or after January 1,
                             2003.  Other  provisions  of the Act took effect on
                             June 7, 2002
---------------------------- ---------------------------------------- --------------------------
Connecticut                  Connecticut  Abusive  Home Loan Lending  High Cost Home Loan
                             Practices  Act,  Conn.  Gen.  Stat.  ▇▇.▇▇.
                             36a-746 et seq.
                             Effective October 1, 2001
---------------------------- ---------------------------------------- --------------------------
District of Columbia         Home Loan  Protection Act, D.C. Code ▇▇.▇▇.  Covered Loan
                             26-1151.01 et seq.
                             Effective  for loans closed on or after
                             January 28, 2003
---------------------------- ---------------------------------------- --------------------------
Florida                      Fair Lending Act,  Fla.  Stat.  ▇▇▇. ▇▇.▇▇.  High Cost Home Loan
                             494.0078 et seq.
                             Effective October 2, 2002
---------------------------- ---------------------------------------- --------------------------
Georgia (Oct. 1, ▇▇▇▇ -      ▇▇▇▇▇▇▇  ▇▇▇▇  ▇▇▇▇▇▇▇  ▇▇▇,  ▇▇.  Code  High Cost Home Loan
Mar. 6, 2003)                ▇▇▇. ▇▇.▇▇. 7-6A-1 et seq.
                             Effective October 1, 2002 - March 6,
                             2003
---------------------------- ---------------------------------------- --------------------------
Georgia as amended (Mar.     Georgia  Fair  Lending  Act,  Ga.  Code  High Cost Home Loan
7, 2003 - current)           ▇▇▇. ▇▇.▇▇. 7-6A-1 et seq.
                             Effective  for loans closed on or after
                             March 7, 2003
---------------------------- ---------------------------------------- --------------------------
HOEPA Section 32             Home  Ownership  and Equity  Protection  High Cost Loan
                             Act of  1994,  15  U.S.C.  ss.  1639,  12
                             C.F.R. ▇▇.▇▇. 226.32 and 226.34
                             Effective October 1, 1995, amendments
                             October 1, 2002
---------------------------- ---------------------------------------- --------------------------
Illinois                     High Risk Home  Loan  Act,  Ill.  Comp.  High Risk Home Loan
                             Stat. tit. 815, ▇▇.▇▇. 137/5 et seq.
                            Effective January 1, 2004 (prior to
                             this    date,     regulations     under
                             Residential    Mortgage   License   Act
                             effective from May 14, 2001)
---------------------------- ---------------------------------------- --------------------------
Kansas                       Consumer  Credit Code,  Kan. Stat. ▇▇▇.  High    Loan   to   Value
                             ▇▇.▇▇. 16a-1-101 et seq.                 Consumer   Loan  (id.   ss.
                                                                      16a-3-207)
and;
                             Sections 16a-1-301 and 16a-3-207         High  APR  Consumer  Loan
                             became effective April 14, 1999;         (id. ss. 16a-3-308a)
                             Section 16a-3-308a became effective
                             July 1, 1999
---------------------------- ---------------------------------------- --------------------------
Kentucky                     2003 KY H.B.  287 - High Cost Home Loan  High Cost Home Loan
                             Act, Ky. Rev. Stat. ▇▇.▇▇. 360.100 et seq.
                             Effective June 24, 2003
---------------------------- ---------------------------------------- --------------------------
Maine                        Truth in Lending,  Me. Rev. Stat.  tit.  High    Rate   High   Fee
                             9-A, ▇▇.▇▇. 8-101 et seq.                    Mortgage
                             Effective  September  29,  1995  and as
                             amended from time to time
---------------------------- ---------------------------------------- --------------------------
Massachusetts                Part 40 and  Part  32,  209  C.M.R.  ▇▇.▇▇.  High Cost Home Loan
                             32.00 et seq.  and 209 C.M.R.  ▇▇.▇▇. 40.01
                             et seq.
                             Effective March 22, 2001 and amended
                                from time to time
---------------------------- ---------------------------------------- --------------------------
Nevada                       Assembly ▇▇▇▇ No. 284, Nev. Rev.  Stat.  Home Loan
                             ▇▇.▇▇. 598D.010 et seq.
                             Effective October 1, 2003
---------------------------- ---------------------------------------- --------------------------
New Jersey                   New Jersey Home Ownership  Security Act  High Cost Home Loan
                             of 2002,  N.J. Rev.  Stat. ▇▇.▇▇. 46:10B-22
                             et seq.
                             Effective  for loans closed on or after
                             November 27, 2003
---------------------------- ---------------------------------------- --------------------------
New Mexico                   Home Loan  Protection  Act,  N.M.  Rev.  High Cost Home Loan
                             Stat. ▇▇.▇▇. 58-21A-1 et seq.
                             Effective as of January 1, 2004;
                             Revised as of February 26, 2004
---------------------------- ---------------------------------------- --------------------------
New York                     N.Y. Banking Law Article 6-l             High Cost Home Loan
                             Effective for applications made on or
                             after April 1, 2003
---------------------------- ---------------------------------------- --------------------------
North Carolina               Restrictions  and  Limitations  on High  High Cost Home Loan
                             Cost Home Loans,  N.C.  Gen.  Stat.  ▇▇.▇▇.
                             24-1.1E et seq.
                             Effective July 1, 2000; amended
                             October 1, 2003 (adding  open-end lines
                             of credit)
---------------------------- ---------------------------------------- --------------------------
Ohio                         H.B. 386 (codified in various  sections  Covered Loan
                             of the Ohio Code),  Ohio Rev. Code ▇▇▇.
                             ▇▇.▇▇. 1349.25 et seq.
                             Effective May 24, 2002
---------------------------- ---------------------------------------- --------------------------
Oklahoma                     Consumer   Credit  Code   (codified  in  Subsection 10 Mortgage
                             various sections of Title 14A)
                             Effective July 1, 2000; amended
                             effective January 1, 2004
---------------------------- ---------------------------------------- --------------------------
South Carolina               South  Carolina  High Cost and Consumer  High Cost Home Loan
                             Home  Loans  Act,  S.C.  Code  ▇▇▇.  ▇▇.▇▇.
                             37-23-10 et seq.
                             Effective  for loans  taken on or after
                             January 1, 2004
---------------------------- ---------------------------------------- --------------------------
West Virginia                West  Virginia   Residential   Mortgage  West  Virginia   Mortgage
                             Lender,  Broker and  Servicer  Act,  W.  Loan Act Loan
                             Va. Code ▇▇▇. ▇▇.▇▇. 31-17-1 et seq.
                             Effective June 5, 2002
---------------------------- ---------------------------------------- --------------------------
STANDARD & POOR'S COVERED LOAN CATEGORIZATION
---------------------------- ---------------------------------------- --------------------------
    State/Jurisdiction           Name of Anti-Predatory Lending            Category under
                                                                             Applicable
                                                                       Anti-Predatory Lending
                                       Law/Effective Date                        Law
---------------------------- ---------------------------------------- --------------------------
Georgia (Oct. 1, 2002 -      Georgia  Fair  Lending  Act,  Ga.  Code  Covered Loan
Mar. 6, 2003)                ▇▇▇. ▇▇.▇▇. 7-6A-1 et seq.
                             Effective October 1, 2002 - March 6,
                             2003
---------------------------- ---------------------------------------- --------------------------
New Jersey                   New Jersey Home Ownership  Security Act  Covered Home Loan
                             of 2002,  N.J. Rev.  Stat. ▇▇.▇▇. 46:10B-22
                             et seq.
                             Effective November 27, 2003 - July 5,
                             2004
---------------------------- ---------------------------------------- --------------------------
STANDARD & POOR'S HOME LOAN CATEGORIZATION
------------------------------------------------------------------------------------------------
    State/Jurisdiction           Name of Anti-Predatory Lending            Category under
                                                                             Applicable
                                                                       Anti-Predatory Lending
                                       Law/Effective Date                        Law
---------------------------- ---------------------------------------- --------------------------
Georgia (Oct. 1, 2002 -      Georgia  Fair  Lending  Act,  Ga.  Code  Home Loan
Mar. 6, 2003)                ▇▇▇. ▇▇.▇▇. 7-6A-1 et seq.
                             Effective October 1, 2002 - March 6,
                             2003
---------------------------- ---------------------------------------- --------------------------
New Jersey                   New Jersey Home Ownership  Security Act  Home Loan
                             of 2002,  N.J. Rev.  Stat. ▇▇.▇▇. 46:10B-22
                             et seq.
                             Effective  for loans closed on or after
                             November 27, 2003
---------------------------- ---------------------------------------- --------------------------
New Mexico                   Home Loan  Protection  Act,  N.M.  Rev.  Home Loan
                             Stat. ▇▇.▇▇. 58-21A-1 et seq.
                             Effective as of January 1, 2004;
                             Revised as of February 26, 2004
---------------------------- ---------------------------------------- --------------------------
North Carolina               Restrictions  and  Limitations  on High  Consumer Home Loan
                             Cost Home Loans,  N.C.  Gen.  Stat.  ▇▇.▇▇.
                             24-1.1E et seq.
                             Effective July 1, 2000; amended
                             October 1, 2003 (adding  open-end lines
                             of credit)
---------------------------- ---------------------------------------- --------------------------
South Carolina               South  Carolina  High Cost and Consumer  Consumer Home Loan
                             Home  Loans  Act,  S.C.  Code  ▇▇▇.  ▇▇.▇▇.
                             37-23-10 et seq.
                             Effective  for loans  taken on or after
                             January 1, 2004
---------------------------- ---------------------------------------- --------------------------
                                   SCHEDULE A
                         Schedule of Mortgage Loans with
                            Defective Mortgage Files