You need some mod'd drivers to fold with. I do believe the new .92's were supposed to have built-in CUDA support..so they should work as well..not to sure about PPD differences compared to the 177.35's though [supposedly the fastest driver to date for folding use].
After you have installed both GPU clients, you need to make shortcuts for them on your desktop [very important that it is a shortcut]. Right-click on the short-cut and select properties. In the 'Target' window, add the following: -gpu 0
to the end of the existing text..then apply and click 'ok'. Do the same for the 2nd GPU client.. but add: -gpu 1
instead..this will address both GPU's to their correct client.
should look something like this->
"D:folding crapFolding@home-Win32-GPU_XP-620Folding@home-Win32-GPU.exe" -gpu 0 -verbosity 8
Now, as long as you have the compatible drivers you should be all set.