Is this your pc:
Packard Bell Multimedia 7951
Celeron-466, 96MB of SDRAM, 128KB L2 cache, 10.2GB hard drive, midsize tower case, 15-inch monitor, Windows 98, SIS 620 graphics with 4MB of SDRAM, CD-ROM drive, 56-kbps V.90 modem, OEM speakers.
Have you tried DriverGuide.com.
or here:
http://download.sis.com/sisdlc/driver_select.jsp