Quake3 OpenGL with notebook

I have a PII-400 MHz notebook with a ATI Rage LT Pro 8MB graphic card with Windows 2000 Professional.

I want to play games like Quake3 on it.
But Quake 3 says, that he can’t find the OpenGL hardwareaccelator.

I have heard from programs like GLSetup (www.glsetup.com), but this programm didn’t work on Windows 2000.
May anybody of you knows a program, which is similar to GLSetup???
Or what kind of driver do I have to install??