My MBP has 2gb ram, and I'm considering installing Fusion and XP Pro. I understand by default Fusion allocates 256mb of ram, I'd like to bump that to 512mb or 1gb. What do you guys use? Would I have any adverse effects on the OS X side if i allocate 1gb to Fusion? Also what format do you use for the hard drive when you install XP? (ie FAT32 or NTFS) Thanks!