EX-99.1 6 isig031093_ex99-1.txt CERTIFICATION EXHIBIT 99.1 CERTIFICATION The undersigned certifies pursuant to 18 U.S.C.ss.1350, that: (1) The accompanying Annual Report on Form 10-K for the period ended December 31, 2002, 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 accompanying Annual Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: March 10, 2003 /s/ Scott F. Drill -------------------------- Scott F. Drill President and Chief Executive Officer