If your looking for some FPS's try Stux! Download the game packages and install, then start shooting.

www.gpstudio.com/stux

I have tested Stux on four different machines with these different graphics cards. Nvidia ti4600, Intel i810, ATI Rage, and Radeon 9800 pro. The Nvidia card required a special driver package which is availible at the Stux website. Very easy to install! The Intel and i810 worked straight from a default boot, just type "stux xauto". The Radeon failed to load.

The Stux site has packages for Q3A demo, UT2003, Quake 1+2, and Doom legacy.