How I change refresh rate?

I have WinXP and a GF4 MX440, everythings works fine, but I can’t change the refresh rate under OpenGL games… there is a way to change them, i.e. to put 640x480, 800x600 at 85hz instead of 60hz default? in all modes? (OpenGL / Direct3D / Windows)

Nah… I found already the solution… ReForce…

well… can u tell me the soluteion