which version of VMWare did you install?? I had to get VMWare Workstation 6 Beta as that is the only one that has official Vista support and VMWare Server 5.x would not even install for me.
Either way, make sure when you setup the VM that you change the number of cores to let the VM use... it defaulted to 1 for me and I had to change it to 2.
Then if you're installing Ubuntu 64-bit, make sure you type 'sudo apt-get install ia32-libs' from a console before trying to run the folding client. This will save you some frustration after you thought you were finished.
Just some tips I remember from setting up mine.
