<< I'm not sure, but it seems to be working better now. What settings should I check off in the OpenGL and D3D properties?? >>
What do you mean? In the refreshlock program? I don't know cuz I don't have an ATI card under WinXP. In CS however, you should enable cl_showfps 1 so that you can see what your FPS is.. that'll give you an idea of what your refresh rate is at.
Hope it works