I'm back in the states long enough to order some software and I want to set up a boot camp / fusion partition on my MBP but I'm wondering what version I should purchase? On one hand I'm looking at the 64bit version of Vista ultimate because I've heard its incredibly stable and that sounds like a good deal to me. But does this version run in a virtual machine like Fusion and in that situation will the stability even matter all that much? Contrasting this, I also heard that a lot of programs don't install or work correctly under the 64bit version of Vista. If that's the case, then I'm not sure it will really work out. I'd like to be able to do myriad things with this install and don't want to feel burdened by compatibility issues. If I don't go 64bit, I guess the choice is between Vista and XP SP3. I know that the vista install is a lot more streamlined but XP3 has that tried and true everything works feel about it. Finally, if I buy OEM versions of windows, will I run into licensing trouble when trying to use it with Boot Camp and on a virtual machine? I'm working in Japan right now and I don't have the time or the money to be ringing up MS every week when windows thinks I'm trying to pirate it because I'm running in a VM.