How does running parallels affect the performance of your mac? (more specifically, the 13 in MBP with 2GB Ram)I Don't have that much RAM, but i would like to run parallels as well. Anyone have experience running this program with 2GB RAM? I won't being running anything to intensive, probably no or little games running thru windows.(I plan on using XP) Also, I've head that you need to dedicate an amoun tof memory to Paralllels? If I do so, but I am not running the program, will I have all 2GB of my RAM available for Leopard? Thanks!