I just switched over to WinXP and i wanted to turn off vsync to run my app, so i went to desktop-rightclick-properties-settings-advance-geforce blah-and then i usually go to additonal properties and then from there turn off vsync, but additonal properties button was inactive... can someone tell me how to activiate the button again or another way to turn off vsync, i could do it through code but i am waiting till the end to do that.. thanks for any help

Is there a openGL tab?