I am running Vista x64 with Saitek stick and Saitek pedals, no problem at all as Saitek provides the drivers.
However, as you have a MSFF2 and CH rudder pedals, my guess is that there are no Vista drivers...
My advice is to check if there are Vista x64 drivers for your gear, and if not, you will have to stay with Win XP. No worries m8, XP is still a very good OS, as good as Vista IMHO
