Document:

Exhibit 10.3

ASSET ACQUISITION AGREEMENT

USA TELCOM INTERNATIONALE IRREVOCABLE AGREES TO SELL THE THE FOLLOWING ASSETS TO
AMVI 1ST CORPORATION, INC FOR $10,300. THE TOTAL FUNDS SHALL BE BANK WIRED
TRANSFERRED ON OR BEFORE 23 MARCH 2004 TO USA TELCOM INTERNATIONALE CITI BANK
ACCOUNT, LAS VEGAS, NEVADA.

1.       5,000 SHARES IN A PENDING PUBLIC CORP. FOR           $   100.00

2.       COMPUTER SYSTEM, CPU, MONITOR & PRINTER              $   200.00

3.       $300,000. NOTE RECEIVABLE WITH INTEREST              $10,000.00

         EXTENSION TO 15 DEC 04 AND PRINCIPLE EXTENSION
         TO 31 MARCH 2006.

USA TELCOM INTERNATIONALE                   AMVI 1ST CORPORATION

BY: /s/ Allen E. Jones                      BY: /s/ Allen E. Jones
ALLEN E. JONES, PRES/CEO                    ALLEN E. JONES, PRES/CEO
2620 S. MARYLAND PKW, STE 14                2820 W. CHARLESTON, STE 28
LAS VEGAS, NV 89109                         LAS VEGAS, NV 89102Amendment No. 1
                                       To
                        Separation Agreement and Release
                                     Between
                 Jay Oyakawa and Calypte Biomedical Corporation

This Amendment No.1 to the Separation Agreement and Release (the "Agreement")
dated January 19, 2004 between Jay Oyakawa ("Oyakawa") and Calypte Biomedical
Corporation (the "Company") is effective this 25th day of February 2004.

WHEREAS, under the terms of the Agreement, Oyakawa is entitled to payment of an
aggregate of $350,000 in cash in twelve monthly installments of $29,166 each, of
which two payments have been made prior to the effective date of this Amendment
No.1, leaving a remaining balance due Oyakawa of $291,668 ; and

WHEREAS, Oyakawa has expressed an interest in accepting a portion of the
remaining amounts due to him by the Company in the form of the Company's common
stock; and

WHEREAS, the Company is agreeable to such an arrangement;

NOW, THEREFORE, for good and valuable consideration, the parties agree as
follows:

I. At any time following the effective date of this Amendment No. 1, and in one
or more requests during the period of time in which payments under the Agreement
are required, Oyakawa may request settlement of all or any portion of the
remaining balance due to him under the Agreement (the "Requested Settlement
Amount") in shares of the Company's common stock, in lieu of cash. The amount of
common stock to be issued will be determined by the following formula:

A.    If the  Company  issues  shares  of  its  common  stock  which  have  been
      registered pursuant to an effective registration statement :

         Requested Settlement Amount / Market Price of Common Stock x 110%

B.    If the  Company  issues  restricted  (unregistered)  shares of its  common
      stock:

         Requested Settlement Amount / Market Price of Common Stock x 120%

C.    For the purposes of this Amendment No. 1, Market Price of Common Stock
      shall be defined as the average of the closing trade prices of the
      Company's common stock as reported on the OTC Bulletin Board (or such
      other market or stock exchange on which the Company's stock shall be
      listed, if not on the Bulletin Board) for the five most recent trading
      days preceding, but not including, the date on which Oyakawa informs the
      Company in writing of the Requested Settlement Amount.

<PAGE>

D.    In the event that Oyakawa requests a Requested Settlement Amount that is
      less than the entire remaining amount due under the Agreement, the Company
      will continue to pay Oyakawa monthly in cash an amount representing the
      remaining amount due under the Agreement less the Requested Settlement
      Amount divided by the remaining duration of monthly payments as specified
      in the Agreement.

II. The Company agrees to provide cost-free registration rights to Oyakawa for
any restricted shares of its common stock which it may issue to Oyakawa pursuant
to this Amendment No. 1, using its best commercial efforts to include such
shares in the next registration statement it files with the SEC.

III. All other terms of the Agreement shall remain unchanged.

When signed by the parties below, this Amendment No.1 is agreed and effective as
of the date first written above

  /s/ Jay Oyakawa
--------------------------------
Jay Oyakawa

Calypte Biomedical Corporation

  /s/ Richard D. Brounstein
-----------------------------------
By:  R. Brounstein
Title:  EVP and CFOEXHIBIT 4.3

NUMBER                                                                 SHARES
ABI 0

                                                               See Reverse for
                                                             Certain Definitions
                                                               CUSIP 00750J100

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                           ADVANCED BIOTHERAPY, INC.

                   TOTAL AUTHORIZED ISSUE 320,000,000 SHARES

200,000,000 SHARES PAR VALUE $0.001 EACH      20,000,000 SHARES PAR VALUE $0.001
             COMMON STOCK                             EACH PREFERRED STOCK

This Certifies that _____________________________________________________ is the

registered holder of ____________________________________________________ Shares

                           ADVANCED BIOTHERAPY, INC.

transferable only on the books of the Corporation by the holder hereof in
person or by Attorney upon surrender of this Certificate properly endorsed.

Witness the Facsimile Seal of the Corporation and the Facsimile Signatures
of its duly authorized officers.

Dated:

     [SIGNATURE ILLEGIBLE]                        [SIGNATURE ILLEGIBLE]
          President                                    Secretary

                            ADVANCED BIOTHERAPY INC.
                              CORPORATE SEAL 2000
                                    DELAWARE

COUNTERSIGNED AND REGISTERED:
AMERICAN STOCK TRANSFER & TRUST COMPANY
                          TRANSFER AGENT
                          AND REGISTRAR

BY

                   AUTHORIZED SIGNATURE

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

JR 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)

    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
represented by the within Certificate, and do hereby irrevocably constitute and
appoint _________________________________________________________ Attorney to
transfer the said Shares on the books of the within named Corporation with full
power of substitution in the premises.

Dated ___________________

       In presence of

---------------------------              ---------------------------

NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS
WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR WITHOUT
ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.Exhibit 4.1(a)

                AMENDMENT NO. 1 TO SECURITIES PURCHASE AGREEMENT

                                 April 29, 2004

         Reference is made to that certain Securities Purchase Agreement dated
March 15, 2004 by and between Global Payment Technologies, Inc., a Delaware
corporation (the "Borrower") and LAURUS MASTER FUND, LTD., c/o Ironshore
Corporate Services Ltd., P.O. Box 1234 G.T., Queensgate House, South Church
Street, Grand Cayman, Cayman Islands (the "Laurus"") (the "Securities Purchase
Agreement") pursuant to which, among other things, the Borrower issued a note in
the original principal amount of One Million Five Hundred Thousand Dollars
($1,500,000) (the "Note") to Laurus. Capitalized terms used herein without
definition shall have the meanings ascribed to such terms in the Securities
Purchase Agreement.

         WHEREAS, the Borrower and Laurus have agreed to amend the Securities
Purchase Agreement and each of the Borrower and Laurus desires to make certain
changes to the Securities Purchase Agreement to address the comments made by the
National Association of Securities Dealer Automated Quotation System market
where the common stock of the Borrower is listed for trading.

         NOW, THEREFORE, in consideration of the above, and for other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereto agree as follows:

     1.   Section 10.2 of the Securities Purchase Agreement is hereby deleted in
          its entirety and the insert the following paragraph inserted in its
          stead:

              "10.2 Maximum Conversion. Notwithstanding anything contained
     herein to the contrary, the Purchaser shall not be entitled to convert
     pursuant to the terms of the Note an amount that would (a) be convertible
     into that number of shares of Common Stock which, when added to the number
     of shares of Common Stock otherwise beneficially owned by such Purchaser
     including those issuable upon exercise of warrants held by such Purchaser
     would exceed 4.99% of the outstanding shares of Common Stock of the Company
     at the time of conversion or (b) (ii) exceed twenty five percent (25%) of
     the aggregate dollar trading volume of the Common Stock for the ten (10)
     day trading period immediately preceding delivery of a Notice of Conversion
     to the Company. For the purposes of the immediately preceding sentence,
     beneficial ownership shall be determined in accordance with Section 13(d)
     of the Exchange Act and Regulation 13d-3 thereunder. The conversion
     limitation described in this Section 10.2 shall automatically become null
     and void without any notice to Company upon the occurrence and during the
     continuance beyond any applicable grace period of an Event of Default, or
     upon 75 days prior notice to the Company, except that at no time shall the
     beneficial ownership exceed 19.99% of the borrower's common stock.
     Notwithstanding anything contained herein to the contrary, the number of

<PAGE>

                                                                  Exhibit 4.1(a)

     shares of Common Stock issuable by the Company and acquirable by the
     Purchaser at a price below $4.06 per share pursuant to the terms of the
     Secured Convertible Term Note, any convertible note issued by the Company
     to the Purchaser, and/or Warrants issued by the Company to the Purchaser
     pursuant to this Securities Purchase Agreement (the "March Transaction
     Documents"), shall not exceed an aggregate of 1,110,000 shares of the
     Company's Common Stock, (subject to appropriate adjustment for stock
     splits, stock dividends, or other similar recapitalizations affecting the
     Common Stock) (the "Maximum Common Stock Issuance"), unless the issuance of
     shares hereunder in excess of the Maximum Common Stock Issuance shall first
     be approved by the Company's shareholders. If at any point in time and from
     time to time the number of shares of Common Stock issued pursuant to the
     terms of the March Transaction Documents, together with the number of
     shares of Common Stock that would then be issuable by the Company to the
     Purchaser in the event of a conversion or exercise pursuant to the terms of
     the March Transaction Documents, would exceed the Maximum Common Stock
     Issuance but for this Section, the Company shall promptly call a
     shareholders meeting to solicit shareholder approval for the issuance of
     the shares of Common Stock hereunder in excess of the Maximum Common Stock
     Issuance."

     2.   The foregoing amendment shall be effective as of the date hereof.

     3.   There are no other amendments to the Securities Purchase Agreement,
          and all of the other forms, terms and provisions of the Securities
          Purchase Agreement remain in full force and effect.

     4.   The Borrower hereby represents and warrants to Laurus that as of the
          date hereof all representation, warranties and covenants made by
          Borrower in connection with the Securities Purchase Agreement are true
          correct and complete and all of Borrower's covenants requirements have
          been met.

<PAGE>

                                                                  Exhibit 4.1(a)

         IN WITNESS WHEREOF, each of the Borrower and Laurus has caused this
Amendment No. 1 to Securities Purchase Agreement signed in its name effective as
of this 29th day of April, 2004.

                                             GLOBAL PAYMENT TECHNOLOGIES, INC.

                                             By:________________________________
                                                  Name:
                                                  Title:

                                             LAURUS MASTER FUND, LTD.

                                             By:______________________________
                                             Name:
                                             Title:

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