Document:

Amendment No. 1 to the Amended and Restated Trust Agreement

 Exhibit 4.2 
 EXECUTION COPY 
 AMENDMENT NO. 1 
 TO THE 
 AMENDED AND RESTATED TRUST AGREEMENT 
 Amendment No. 1, dated as of April 24, 2007 (the “Amendment”), to the Amended and Restated Trust Agreement (the
“Agreement”) dated as of June 8, 2006, by and among NovaStar Certificates Financing Corporation, as depositor (the “Depositor”) and Wilmington Trust Company, as owner trustee (the “Owner
Trustee”). Capitalized terms used and not defined herein shall have the meaning set forth in the Agreement. 
 WHEREAS the parties
hereto have entered into the Agreement; 
 WHEREAS the parties hereto now wish to amend certain provisions in the Agreement pursuant to
Section 12.01 of the Agreement; and 
 WHEREAS the Owner Trustee shall not consent to this Amendment to the Agreement unless it shall
have first received an Opinion of Counsel, to the effect that this Amendment does not adversely affect in any material respects the interests of any Noteholder or Certificateholder and will not cause the Issuing Entity to be subject to an
entity-level tax for federal income tax purposes. 
 NOW, THEREFORE, in consideration of the promises and mutual agreements contained herein,
the parties hereto agree to amend the Agreement pursuant to Section 12.01 of the Agreement and restate certain provisions thereof as follows: 
 1. The Amendment. 
 (a) Section 4.09(a) is hereby amended by adding the following sentence to the end of the section:

 Provided, however, that in lieu of an Investment Letter covering clause (i) above, an Opinion of Counsel is delivered to the Owner
Trustee and the Certificate Registrar that (i) such transfer or exchange may be made pursuant to an exemption, describing the applicable exemption and the basis therefore, from the Securities Act or is being made pursuant to the Securities Act
and (ii) such transfer or exchange will not cause the Issuing Entity to become subject to the Investment Company Act of 1940. 
 (b)
Section 4.09(a)(iii) is hereby amended by adding the following words to the end of the section after the word “LAWS” and before the period: 
 UNLESS AN OPINION OF COUNSEL IS DELIVERED TO THE OWNER TRUSTEE AND THE CERTIFICATE REGISTRAR THAT (I) SUCH TRANSFER OR EXCHANGE MAY BE MADE PURSUANT TO AN EXEMPTION, DESCRIBING THE APPLICABLE EXEMPTION AND THE
BASIS THEREFORE, FROM THE SECURITIES ACT OR IS BEING MADE PURSUANT TO THE 

 
SECURITIES ACT AND (II) SUCH TRANSFER OR EXCHANGE WILL NOT CAUSE THE ISSUING ENTITY TO BECOME SUBJECT TO THE INVESTMENT COMPANY ACT OF 1940. 

(c) Section 4.09(g) is hereby amended and restated in its entirety to read as follows: 
 No pledge or transfer of the Certificates shall be effective unless such pledge or transfer is (i) of a 100% Percentage Interest of all of the
Certificates, and (ii) (a) to a single beneficial owner that represents that it qualifies for taxation as a REIT or is a Qualified REIT Subsidiary or (b) accompanied by an Opinion of Counsel satisfactory to the Owner Trustee, which
Opinion of Counsel shall not, unless otherwise agreed, be an expense of the Issuing Entity, the Certificate Registrar, the Servicer, or the Sponsor, to the effect such pledge or transfer will not cause the Issuing Entity to be subject to an
entity-level tax for federal income tax purposes. 
 (d) The first paragraph of Exhibit A and the second paragraph of Exhibit E is hereby
amended to add the following words to the end of the second sentence after the word “LAWS” and before the period: 
 UNLESS AN
OPINION OF COUNSEL IS DELIVERED TO THE OWNER TRUSTEE AND THE CERTIFICATE REGISTRAR THAT (I) SUCH TRANSFER OR EXCHANGE MAY BE MADE PURSUANT TO AN EXEMPTION, DESCRIBING THE APPLICABLE EXEMPTION AND THE BASIS THEREFORE, FROM THE SECURITIES ACT OR
IS BEING MADE PURSUANT TO THE SECURITIES ACT AND (II) SUCH TRANSFER OR EXCHANGE WILL NOT CAUSE THE ISSUING ENTITY TO BECOME SUBJECT TO THE INVESTMENT COMPANY ACT OF 1940. 
 (e) Exhibit C is hereby amended by amending and restating in its entirety the paragraph numbered 3 to read as follows: 
 The Certificateholder understands that the Certificate has not been and will not be registered under the Securities Act and may be offered, sold, pledged
or otherwise transferred to a person whom the transferor reasonably believes is (A) a qualified institutional buyer (as defined in Rule 144A under the Securities Act) or (B) a Person involved in the organization or operation of the Issuing
Entity or an affiliate of such Person, (I) in a transaction pursuant to an effective registration statement under the Securities Act and any applicable state securities laws or (II) exempt from the registration requirements of the Securities
Act and any such state securities laws and an Opinion of Counsel is delivered to the Owner Trustee and the Certificate Registrar that (i) such transfer or exchange may be made pursuant to an exemption, describing the applicable exemption and
the basis therefore, from the Securities Act or is being made pursuant to the Securities Act and (ii) such transfer or exchange will not cause the Issuing Entity to become subject to the Investment Company Act of 1940. The Certificateholder
understands that the Certificate bears a legend to the foregoing effect. 
  

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 (f) The third to last paragraph of Exhibit A and the penultimate paragraph of Exhibit E is hereby amended
and restated in its entirety to read as follows: 
 No pledge or transfer of the Certificates shall be effective unless such pledge or
transfer is (i) of a 100% Percentage Interest of all the Certificates and (ii) either (a) to a beneficial owner that represents that it qualifies for taxation as a REIT or is a Qualified REIT Subsidiary or (b) accompanied by an
Opinion of Counsel satisfactory to the Owner Trustee, which Opinion of Counsel shall not, unless otherwise agreed, be an expense of the Issuing Entity, the Certificate Registrar, the Servicer, or the Sponsor, to the effect such pledge or transfer
will not cause the Issuing Entity to be subject to an entity-level tax for federal income tax purposes. 
 (g) Exhibit C is hereby amended by
adding brackets before the first word and after the last word of paragraphs 5 and 11 and by adding the following bracketed sentence to the end of paragraph 5: 
 [Only include if an Opinion of Counsel contemplated by Section 4.09(a) of the Trust Agreement is not being delivered.] 
 and by adding the following bracketed sentence to the end of paragraph 11: 
 [Only include if an Opinion of
Counsel contemplated by Section 4.09(g) of the Trust Agreement is not being delivered.] 
 2. Condition to effectiveness. As a
condition to the effectiveness of this Amendment, an Opinion of Counsel satisfying the requirements of Section 12.01 of the Agreement has been received by the Parties hereto. 
 3. Effect of Amendment. This Amendment to the Agreement shall be effective and the Agreement shall be deemed to be modified and amended in
accordance herewith upon the occurrence of (a) the prior written notice to the Rating Agencies of this Amendment pursuant to Section 12.01 of the Agreement and (b) the receipt by the Owner Trustee of an Opinion of Counsel that this
Amendment does not adversely affect in any material respects the interests of any Noteholder or Certificateholder and will not cause the Issuing Entity to be subject to an entity-level tax for federal income tax purposes. This Amendment, once
effective, shall be effective as of the date first set forth above. Notwithstanding the amendments to Exhibit A and Exhibit E, it will not be necessary to amend the presently outstanding Trust Certificate or Class C Certificate, it being understood
that (i) the Certificateholder agreed to such modification by signing this Amendment and (ii) all future Trust Certificates and Class C Certificates will include the language in Exhibit A and Exhibit E, respectively, as modified. The
Depositor shall give prompt written notice to the Certificateholders, Indenture Trustee, and each of the Rating Agencies of this Amendment pursuant to Section 12.01 of the Agreement. The respective rights, limitations, obligations, duties,
liabilities and immunities of the Depositor, the Owner Trustee, the Indenture Trustee, the Issuing Entity, the Sponsor, the Servicer, the Custodian, the Co-Trustee, each of the Noteholders and the 

  

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Certificateholders shall hereafter be determined, exercised and enforced subject in all respects to such modifications and amendments, and all the terms and
conditions of this Amendment shall be and be deemed to be part of the terms and conditions of the Agreement for any and all purposes. The Agreement, as amended hereby, is hereby ratified and confirmed in all respects. 
 4. The Agreement in Full Force and Effect as Amended. Except as specifically amended hereby, all the terms and conditions of the Agreement shall
remain in full force and effect and, except as expressly provided herein, the effectiveness of this Amendment shall not operate as, or constitute a waiver or modification of, any right, power or remedy of any party to the Agreement. All references
to the Agreement in any other document or instrument shall be deemed to mean the Agreement as amended by this Amendment. 
 5.
Counterparts. This Amendment may be executed by the Parties in several counterparts, each of which shall be deemed to be an original and all of which shall constitute together but one and the same agreement. This Amendment shall become
effective when counterparts hereof executed on behalf of such Party shall have been received. 
 6. Governing Law. This Amendment
shall be construed in accordance with and governed by the laws of the State of Delaware applicable to agreements made and to be performed therein. 
 7. Limitation of Owner Trustee Liability. It is expressly understood and agreed by the parties that (a) this document is executed and delivered by Wilmington Trust Company, not individually or personally, but solely as Owner
Trustee, in the exercise of the powers and authority conferred and vested in it, pursuant to the Trust Agreement, (b) each of the representations, undertakings and agreements herein made on the part of the Issuing Entity is made and intended
not as personal representations, undertakings and agreements by Wilmington Trust Company but is made and intended for the purpose for binding only the Issuing Entity, (c) nothing herein contained shall be construed as creating any liability on
Wilmington Trust Company, individually or personally, to perform any covenant either expressed or implied contained herein, all such liability, if any, being expressly waived by the parties hereto and by any person claiming by, through or under the
parties hereto, and (d) under no circumstances shall Wilmington Trust Company be personally liable for the payment of any indebtedness or expenses of the Issuing Entity or be liable for the breach or failure of any obligation, representation,
warranty or covenant made or undertaken by the Issuing Entity under this Amendment or any other related documents. 
  

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 IN WITNESS WHEREOF, the Depositor and the Owner Trustee, have caused this Amendment to be duly executed
by their officers thereunto duly authorized, all as of the day and year first above written. 
  

			
	NOVASTAR CERTIFICATES FINANCING CORPORATION, as Depositor and, solely for purposes of Section 3 hereof, as Certificateholder
		
	By:	 	 /s/ Matt Kaltenrieder

	Name:	 	Matt Kaltenrieder
	Title:	 	Vice President
	
	WILMINGTON TRUST COMPANY, not in its individual capacity but solely as Owner Trustee under the Trust Agreement
		
	By:	 	 /s/ Jennifer A. Luce

	Name:	 	Jennifer A. Luce
	Title:	 	Sr. Financial Services Officer

 [Signature Page for Amendment No. 1 to the Amended and Restated Trust Agreement
2006-MTA1] 
  

 5Form of Specimen Stock Certificate

 Exhibit 4.1 
 

 
  
 PROOF 

NUMBER 
 NGSX 001 
 INCORPORATED UNDER THE LAWS OF 
 THE STATE OF DELAWARE 
 NEUROGESX 
 NEUROGESX, INC. 
 SHARES 
 CUSIP 641252 10 1 
 SEE REVERSE FOR CERTAIN DEFINITIONS 
 THIS CERTIFIES THAT 
 is the record holder of 
 FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, $0.001 PAR VALUE PER SHARE, OF 
 NEUROGESX, INC. 
 transferable on the books of the Corporation in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate is not valid until countersigned by the Transfer Agent and registered by the
Registrar. 
 WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.

 COUNTERSIGNED AND REGISTERED: 
 WELLS FARGO BANK, N.A. 
 Transfer Agent and Registrar 
 By: 
 Authorized Signature 
 DATED: 
 CHIEF FINANCIAL OFFICER 
 NEUROGESX, INC. 
 INCORPORATED 
 DELAWARE 
 JANUARY 9, 2007 
 SECRETARY AND PRESIDENT AND CHIEF EXECUTIVE OFFICER 
 PROOF 

 

 
  
 NEUROGESX, INC.

 A statement of the powers, designations, preferences and relative, participating, optional or other special rights of each
class of stock or series thereof and the qualifications, limitations or restrictions of such preferences and/or rights as established, from time to time, by the Certificate of Incorporation of the Corporation and by any certificate of determination,
the number of shares constituting each class and series, and the designations thereof, may be obtained by the holder hereof upon request an without charge from the Secretary of the Corporation at the principal office of the Corporation. 

The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were
written out in full according to applicable laws or regulations: 
 TEN COM – as tenants in common 
 TEN ENT – as tenants by the entireties 
 JT TEN – as joint tenants with right of survivorship and not as tenants in common 
 UNIF GIFT MIN ACT– Custodian 
 (Cust) (Minor) 
 under Uniform Gifts to Minors 
 Act (State) 
 UNIF TRF MIN ACT– Custodian (until age ________ ) 
 (Cust) 
 under
Uniform Transfers 
 (Minor) 
 to Minors Act 
 (State) 
 Additional abbreviations may also be used though not in the above list. 
 For Value received, hereby sell, assign and transfer unto 
 PLEASE INSERT SOCIAL SECURITY OR OTHER 
 IDENTIFYING NUMBER OF ASSIGNEE

 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) 
 Shares 
 of
the Common Stock represented by the within Certificate, and do(es) hereby irrevocably constitute and appoint 
 Attorney

 to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises.

 Dated 
 NOTICE: 
 THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE FACE OF
THE CERTIFICATE IN EVERY PARTICULAR WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER. 
 SIGNATURES GUARANTEED:

 By 
 THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND 
 LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

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