A new version of GeForce Tweak Utility has just been released: 3.2 t29.

This utility allows you make a lot of modifications to the registry settings of any GeForce videocard. GeForce256 DDR, GeForce2/MX/Pro/Ultra, GeForce3, Quadro, Quadro2/Pro/MXR, Quadro DCC. Download GeForce Tweak Utility v3.2 t29 under the beta section.