Document:

EXHIBIT 10.5

                                  AMENDMENT TO
                         EXECUTIVE EMPLOYMENT AGREEMENT

      Amendment dated December 10, 2003 to Executive Employment Agreement dated
April 30, 2001 between Hosting Site Network, Inc., a Delaware corporation (the
"Company") and Scott Vicari (the "Executive").

      WHEREAS, the Company and the Executive entered into an Executive
Employment Agreement dated April 30, 2001 (the "Employment Agreement") pursuant
to which 3,000,000 shares of the Company's common stock (the "Shares") were
issued to the Executive; and

      WHEREAS, the Shares were issued subject to forfeiture based upon the term
of Executive's employment with the Company; and

      WHEREAS, the Company has not commenced material operations and the parties
deem it fair to increase the term which Executive must serve to earn the Shares.

      NOW, THEREFORE, the parties hereto agree as follows:

      1. Conflict Resolution. In the event of any conflict between the
provisions of this Amendment and the provisions of the Employment Agreement the
provisions of this Amendment shall control. Except as otherwise provided herein,
the provisions of the Employment Agreement shall continue with full force and
effect.

      2. Compensation. Section 3 of the Employment Agreement is amended to read
as follows:

      "3. Compensation. The Executive will be paid compensation during this
Agreement as follows:

            (a) No base salary.

            (b) The Executive will be granted a total of 3,000,000 shares of
            common stock of the Company. However, if his employment with the
            Company is terminated prior to December 31, 2004 he forfeits the
            entire 3,000,000 shares of the Company's common stock. If his
            employment with the Company is terminated after December 31, 2004
            but prior to December 31, 2005 he forfeits 2,000,000 shares of the
            Company's stock. If his employment with the Company is terminated
            after December 31, 2005 but prior to December 31, 2006 he forfeits
            the remaining 1,000,000 shares of the Company's stock."

      3. Execution. This Amendment may be executed in separate counterparts,
each of which shall be deemed to be a fully executed original as to all parties
that have executed any one or more of those counterparts. The execution of this
Amendment and the transmission thereof by facsimile shall be binding on the
party signing and transmitting same by facsimile fully and to the same extent as
if a counterpart of this Amendment bearing such party's original signature had
been delivered.

                                       1
<PAGE>

      IN WITNESS WHEREOF, the parties have executed this Amendment as of the
date first above written.

                                        HOSTING SITE NETWORK, INC.

                                        By: /s/ Scott Vicari
                                           -------------------------------------
                                           Name:  Scott Vicari
                                           Title: President

                                        /s/ Scott Vicari
                                        ----------------------------------------
                                        Scott Vicari

                                       2___________________________________      _______________________________________
Number                                   Shares

                              EnerTeck Corporation

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

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

      This CERTIFIES that ______________________________________________________
is the registered holder of _____________________________________________ Shares

 FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, $0.001 PAR VALUE, OF

                              EnerTeck Corporation

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

      In Witness Whereof, the said Corporation has caused this Certificate to be
signed by its duly authorized officers and its Corporate Seal to be hereunto
affixed this _________ day of ________________________ A.D. 20__.

___________________________________      _______________________________________
Treasurer                                President

      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:

<TABLE>
<CAPTION>
<S>         <C>                               <C>
TEN COM   - as tenants in common              UNIF Gift Min
TEN ENT   - as tenants by the entireties               ACT _______________ Custodian _______________
JT TEN    - as joint tenants with right of                     (Cust)                    (Minor)
            survivorship and not as tenants             under Uniform Gifts to Minor Acts
            in common
</TABLE>

      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
IDENTIFICATION NUMBER OF ASSIGNEE

_________________________________________

_________________________________________

________________________________________________________________________________
                  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS,
                     INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_______________________________________________ Shares of the common stock
represented by the within Certificate and do 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 to the 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.<PAGE>

EX-10.29

AGENCY AGREEMENT  AMENDMENT                               SEPTEMBER 1, 2003
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.
             &
ENERTECK CHEMICAL CORP.

                          AMENDMENT TO AGENCY AGREEMENT

                                     BETWEEN

                 ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.

                                       AND

                             ENERTECK CHEMICAL CORP.

This is an AMENDMENT  ("AMENDMENT ") effective  September 1, 2003 to that Agency
Agreement  ("Agreement") which was entered into February 15, 2003 by and between
ECHEMTRADETRADE  ENERGY &  PETROCHEMICALS  LTDA.,  its divisions,  its affiliate
companies  and  concerns,  a  corporation  organized  under the laws of Brazil (
"AGENT ") and the ENERTECK  CHEMICAL  CORP., a corporation  organized  under the
laws of the State of Texas in the United States of America ("EnerTeck").

1.       REPRESENTATION

         The Parties wish to amend and clarify the Agreement as set forth below.

2.       MINIMUM ANNUAL SALES TO MAINTAIN GEOGRAPHIC EXCLUSIVITY

         Appendix "A" of the  Agreement;  Minimum  Annual  Sales for  Geographic
                  Exclusivity shall be and is hereby amended to read as follows:

         Contract Year Ending         Volume of EnerBurn Sold in Territory

         February 15, 2004                           20,000 Gallons
         February 15, 2005                           60,000 Gallons
         February 15, 2006                          100,000 Gallons

3.       TERRITORY

         Appendix "A" of the  Agreement;  TERRITORY  shall be amended to read as
follows:

         BRAZIL
         ARGENTINA
         URUGUAY
         PARAGUAY
         PERU
         CHILE

<PAGE>

4.       COMMISSIONS

         Paragraphthree  of Article 5. of the Agreement shall be amended to read
         as follows:

         "EnerTeck shall pay commissions to Agent on all commercial  accounts in
         Agent's  territory  for as long as this  Agreement is in force and such
         commission  payments  for Active  Accounts  at the time of  termination
         shall continue for five years from the effective date of termination of
         this  Agreement,  regardless of the reason for  termination,  or as the
         Parties may mutually  agree.  An `ACTIVE  ACCOUNT' shall be defined for
         these purposes as any account which has purchased and paid for EnerTeck
         Products within the preceding  twelve-month period,  and/or is actively
         in  negotiations  and/or  discussions  with Agent for the  purchase  of
         Products up to one (1) year prior to the time of termination or loss of
         geographic   exclusivity.   Upon  termination  or  loss  of  geographic
         exclusivity,  Agent  shall  notify  EnerTeck  in  writing of all active
         accounts and it is the  responsibility  of Agent to notify  EnerTeck of
         any changes or additions with respect to Active Accounts.  In the event
         Agent loses  geographic  exclusivity,  EnerTeck  shall protect  Agent's
         proprietary  relationship with Active Accounts and will not arbitrarily
         withhold the  inclusion of additional  Active  Accounts as nominated by
         Agent from time to time."

5.       ACKNOWLEDGEMENT OF "ACTIVE ACCOUNTS"

         EnerTeck hereby  acknowledges and confirms that Agent has been actively
         involved in negotiations  and/or  discussions  with for the purchase of
         Products with the following prospects in the Territory: BR, Vale do Rio
         Doce,  MRS  Logistica,  ALL - Americana  Latina  Logistica,  FCA, 1001,
         Governo do Chile, Mega Petroleo, Ipiiranga,  TransUltra,  TransQuimica.
         Therefore,  all of  those  prospects  shall  be  deemed  to be  "Active
         Accounts"  for the  purpose  of  paragraph  three,  Article  5. of this
         agreement upon termination or loss of geographic exclusivity.

6.       GEOGRAPHIC EXCLUSIVITY FOR BRAZIL

         The Parties  acknowledge  that  Petrobras  (and affiliate BR) are under
         negotiations for an exclusive  sub-distributing contract with Agent for
         the inclusion of EnerBurn in 100% of BR branded  diesel  products.  The
         Parties agree that EnerTeck shall recognize said geographic exclusivity
         in Brazil in the event  that  Agent  loses  geographic  exclusivity  as
         outlined in Article V, where  Petrobras/BR  is  identified as an Active
         Account,  and  Agent  subsequently   contracts  with  Petrobras/BR  for
         Petrobras/BR'  exclusive  distribution of Products in Brazil anytime up
         to one year after termination or loss of geographic exclusivity.

7.       APPENDIX "B" COMMISSION SCHEDULES

FOR ALL GOVERNMENT ACCOUNTS (INCLUDING CHILE, PARAGUAY, BR AND PETROBRAS), Agent
shall be paid a  commission  for  volumes  sold in the amount of the  difference
between (1) the  bulk/Isotank  FOB Houston,  Texas sales price paid to EnerTeck,
and (2) the  commission  basis  price of USD 55.00  per US  gallon  of  EnerBurn
product.

                                                   EXECUTED BY:
ECHEMTRADETRADE ENERGY & PETROCHEMICALS LTDA.      ENERTECK CHEMICAL CORP.

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

Francisco CS Gularte                               Dwaine D. Reese
President and CEO                                  Chairman & CEO

DATE:                                              DATE:

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