Yup, doing that too, and doing pretty well too.

In less than 24 hours I’ve completed 8 work units, using just the High performance client(which uses my GPU)

and because it uses the GPU i can use my pc like normal, without noticing it’s there, which helps out a lot on the folding(unlike the cpu version where it takes over your pc and eats the cpu for dinner)

My Folding@Home profile (at the moment it displays 7, because i just finished the 8th wu)