<PAGE>
                                                                   EXHIBIT 10.29

(HSBC LOGO)

                                August 26, 2002

The New York Mortgage Company LLC
Attention: Steven Schnall, President
304 Park Avenue South
New York, NY 10010

     Re:  Credit and Security Agreement between HSBC Bank USA ("HSBC") and The
          New York Mortgage Company LLC ("Company") dated as of March 30, 2001,
          as amended ("Credit Agreement")

Dear Mr. Schnall:

     The Company's Credit Note to HSBC dated as of April 24, 2001 in the maximum
principal amount of $40,000,000.00 ("Note"), matures August 31, 2002.

     This confirms HSBC's agreement to extend the scheduled maturity date of the
Note and the term of the Credit Agreement to September 15, 2002.

     All amounts advanced after August 31, 2002 and all principal amounts
previously advanced and outstanding as of August 31, 2002 and all other amounts
which may be due HSBC as of August 31, 2002 shall be (i) evidenced by the Note
and governed by the Credit Agreement as extended hereby, and (ii) secured by
all Collateral (as defined in the Credit Agreement).

     The Company agrees that it has no defenses, offsets or counterclaims in
connection with the obligations under the Note and Credit Agreement. To the
extent not modified hereby, the Note and Credit Agreement remain in full force
and effect.


HSBC BANK USA
Mortgage Warehouse Lending, 111 Presidential Boulevard, Suite 202,
Bala Cynwyd, PA 19004
Fax: (610) 668-9630



<PAGE>
The New York Mortgage Company LLC
August 26, 2002
Page 2

     By this agreement HSBC does not waive (i) any existing events of default
under the Note or Credit Agreement, or (ii) any rights or remedies resulting
from any such events of default.

     Please indicate the Company's agreement to the foregoing by signing and
returning a copy of this letter.

                                       Very truly yours,

                                       HSBC Bank USA



                                       By: /s/ James A. Noyes
                                           ------------------------------------
                                           James A. Noyes
                                           Vice President

AGREED:

THE NEW YORK MORTGAGE COMPANY LLC


By: /s/ Steven Schnall
   ------------------------------
   Steven Schnall, Member


RATIFICATION OF GUARANTY

The Guarantor agrees and represents that the Guaranty remains in full force and
effect subject to no offset, claim, counterclaim or defense. The undersigned
agrees and acknowledges that all references to the Credit Agreement in the
Guaranty, means the Credit Agreement, as amended by the Amendment Agreement, as
the same may be hereafter amended from time to time.


/s/ Steven Schnall
---------------------------------
Steven Schnall


RATIFICATION OF GUARANTY

The Guarantor agrees and represents that the Guaranty remains in full force and
effect subject to no offset, claim, counterclaim or defense. The undersigned
agrees and acknowledges that all references to the Credit Agreement in the
Guaranty, means the Credit Agreement, as amended by the Amendment Agreement, as
the same may be hereafter amended from time to time.


/s/ Joseph V. Fierro
----------------------------------
Joseph V. Fierro