GPU folding question

My oc'd XP2400 has a 1950Pro in it which is folding on the GPU.
My CPU usage in Task Manager is at 100%.

Is the CPU *actually* at 100% seeing as the GPU is doing the folding??

Would it be possible to run a *nix client in Virtual Machine and fold along side the GPU?

 

I may be wrong here and I will check further on it Nitrowing, but if the Task Manager says the CPU is at 100% does it not also show that the F@H exe is around 90%+, which is usual with the other clients?????

I believe that the GPU client is for units that have a GPU, as the GPU client in that case uses BOTH the GPU and the CPU, again could be wrong and will check.