Serious Sam 1 wn xp problems

Please help, I love serious sam 1, but cannot play it using my current operating system, win xp as it freezes the game. computer spcs are:

processor: anthlon 1500+
Vidiocard: Onboard s3 graphics twister K. v. (22/11/2002).

tried the website for s3 graphics: couldnt see anything of use - I maybe missing something!!! So i need to know where I can get an up to date driver for my vidio card that will play serious sam 1 on win xp,