I've been running Parallels (Vista Ultimate) on my MBP 2.2/4/10.5.3 for awhile, and it runs fine. I am thinking of adding BootCamp in order to run a RC Flight Simulator (RealFlight G4 - it doesn't run very well in Parallels and the G4 forum says BootCamp is good). Can I use the Vista already installed in Parallels or do I have to install the Vista in BootCamp separately? Any suggestions?