Exhibit 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Greenstar International, Inc. (the
"Company") on Form 10-QSB for the quarter ending April 30, 2008, as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Thomas Diemer Chief Financial Officer, principal financial and accounting
officer of the Company, certify to the best of my knowledge, pursuant to 18
U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

      (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and result of operations of the
Company.

Date: June 16, 2008

By: /s/ Thomas Diemer
    -----------------
    Thomas Diemer, Chief Financal Officer
    principal financial and accounting officer


A signed original of this written statement required by Section 906, another
document authenticating, acknowledging or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to the Company and will be retained
by the Company and furnished to the Securities and Exchange Commission or its
staff upon request.