I used to edit the registry (not the .inf, that was kinda messy)--that worked, and once I had a string for it, it was just "dump that in every time you change drivers." Annoying, but simple.
Then I used RivaTuner 2.0rc11 since they actually updated it
. That worked better.
But RefreshForce is the unrivaled king of refresh rates... blasted thing takes 3 seconds.