Exhibit 99.2 CERTIFICATION PURSUANT TO SECTION 1350, CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of ADVANCED 3-D ULTRASOUND SERVICES, INC. f/k/a YSEEK, Inc. (the "Company") on Form 10-QSB for the period ending March 31, 2004, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, David Weintraub, Chief Executive Officer and Chief Financial Officer of the Company, certify, 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. /s/ David Weintraub - ----------------------------------- David Weintraub Chief Executive Officer Chief Financial Officer April 29, 2004