I got it to work on w7 64 pre-release version. It took A LOT of effort, and I wish I knew what sites helped me but stick to the motionjoy site there should be detailed instructions there and I think that's what got it to work for me..You're going to have to go into the display drivers and edit shit to get this to work.
Thing is, when I installed it on my vista system I was dreading how much it'd be like it was on W7, but it's easy peasy to install on Vista.
Are you pressing f9 or whatever when windows boots up?