hmm... I've got the gpu client installed (they're on Beta 11 now and the official nVidia CUDA drivers are the 177.35's now), but I'm having issues with the SMP client - it looks like I get an error message during install but the window closes too fast for me to see it. I get all the way to entering my username and pass for the computer.
yah, i found that going pure GPU and abandoning SMP was the best bet, if you have an NVidia beast..
matter of fact, on one of the Nvidias, you can run multiple GPUs and rack up many more points than the SMPs can..
the SMPs just don't give the bang for the buck that the GPUs do.