When I recently replaced my boot drive, I ran into the problem that the machine wouldn't boot with the 10.5.x disk. The only real solution at the time was to put a supported card in first, then upgrade... this is because of the third party EVGA drivers. Anyway... I've had snow leopard laying around for awhile now and think its time to upgrade my mac pro. I plan on doing a fresh install again, but am worried about the missing driver issue again. Can you preform a fresh install of 10.6 with the 8800 pre-installed?