SiS Chipset Driver Removal

[needleboy]

I'm looking for a tool to remove the SiS Chipset Drivers from WinXP. There is a certain problem with DOS programs (don't laugh ) that prevents the DOS window to work in full screen when the SiS drivers are the ones from their CD or their site.
Basicaly I need to clean them up completely and work with the drivers that come with WinXP, and do that without reinstalling the whole OS.

Any ideas? Thanks a lot!