i downloaded that version of coolbits too, and it didn't work.. Get it from Guru3d.com. The one they have is just a registry patch that when you double click it, it adds the info to the registry, and you're done. Then all you got to do to OC is go to your advanced display properties for your card, click the new tab coolbits added "Clock Frequencies" check the box to let you OC, it'll want to reboot to detect the cards current frequencies, let it.. once your pc restarts, go back to the OC tab, and OC'ing your card from here is as easy as moving the slider bars to the frequency you want. You'll have to click "test" after you set the new frequencies, then apply (check apply at startup first, once you get your card where you want it), and you're done.
I'm using a Ti4200, works great.