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Exhibit 10.57
 
  I.
    
    In each of Sections 1.3.1, 1.3.3 and 1.3.4, replace Upon the Escrow Agents receipt of
the Purchase Money, which shall not be later than March 26, 2007 with Upon the Escrow
Agents receipt the Purchase Money, pursuant to the Stock Purchase Agreement, as amended.II.
    
    In Section 3 of the Escrow Agreement (as such term is defined in the Stock
Purchase Agreement) replace Not later than March 26, 2007 with Upon the Escrow
Agents receipt the Purchase Money, pursuant to the Stock Purchase Agreement, as
amended.III.
    
    Exhibit A, Software Integration and Resale Agreement, amend Section 3.1.1 as
follows:
 3.1.1.
    
    The Inaugural Sale of 700 Units.
 3.1.1.1.
    
    UDW shall sell seven hundred (700) ATM Dispenser units to Hyundai RFmon
Corp.(Buyer), a wholly-owned subsidiary of Hyundai, for the total sales price
of Three Million Five Hundred Thousand Dollars (US $3,500,000), in accordance
with Purchase Order Nr. UDWI 2007 US001, attached hereto as Exhibit 1
(the Purchase Order).3.1.1.2.
    
    UDW and Hyundai hereby agree that the Purchase Money shall be paid not as
originally contemplated by Hyundai delivering the Purchase Money to the Escrow
Agent on March 26, 2007, but rather by: (i) Hyundai paying US$740,744 (Advance
Payment) to the manufacturer of the Machines, Hyundai Syscomm, Inc., a South
Korea corporation (Manufacturer), on behalf of UDW with no obligation of UDW to
repay or reimburse Hyundai for such Advance Payment.3.1.1.3.
    
    The Advance Payment shall be recognized as a UDW cost of goods sold, for
which UDW shall be reimbursed US$740,744 from the sale proceeds of the Machines,
before the calculation of Gross Profits, pursuant to the Stock Purchase
Agreement. Further, Hyundai shall forgo the next US$759,256 of its share of Gross
Profits to be received from the Purchase Order, and subsequent purchase orders,
until an aggregate amount (including the reimbursed Advance Payment) equaling
US$1,500,000 has been paid to UDW. In other words, in lieu of paying the Purchase
Money to the Escrow Agent, Hyundai will not share in any Gross Profits recognized
by UDW until UDW: (i) is reimbursed US$740,744 from the sales proceeds received
from the Purchase Order, and (ii) has retained an additional US$759,256 from
what, but for this




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Amendment, would have been Hyundais share of Gross Profits from the
sale by UDW of Machines to Buyer under the Purchase Order and from
subsequent sales/transactions.3.1.1.4.
    
    For all purposes of the Escrow Agreement and the Purchase Agreement, the
receipt by UDW of the US$1,500,000 benefit contemplated by Section 3.1.1.3
shall constitute receipt by the Escrow Agent of the Purchase Money and
disbursement of the Purchase Money to UDW.3.1.1.5.
    
    Upon payment to UDW of an aggregate amount of not less than
US$1,500,000, as provided in subsection 3.1.1.3, the Escrow Agreement
shall terminate and the Escrow Agent shall deliver the 6,100,000 Escrow
Shares (as defined in the Stock Purchase Agreement) to Hyundai.3.1.1.6.
    
    UDW shall deliver to the Manufacturer a purchase order, substantially in
the form attached hereto as Exhibit 2 in the amount of US$2,592,604, of
which US$740,744 of this amount shall be offset by the Advance Payment.
 IV.
    
    All other terms and conditions of the Stock Purchase Agreement and the
Escrow Agreement shall remain unchanged.
   UDWUS Dataworks, Inc.By:
    /s/ Charles E. RameyCharles E. RameyChief Executive Officer
 HyundaiHyundai Syscomm Corp.By:
    /s/ Samuel LeeSamuel LeeChairman of the BoardDate:
3/22/07




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