A-tuner is a small Tool for changing the following 4 settings in your Nvidia card and should work with Nvidia Detonators 23.11 - 40.xx and windows 98/ME/2000/XP.

Anti-Aliasing (including all unofficial modes)
Anisotropic Filtering
Vsync
MipMap LOD (Level Of Detail) Bias

Download A-Tuner 1.2.0.5 For windows 98/ME/2000/XP