Have an old white MacBook 2,1 (mid-2007, I believe) with a 2.1 GHz Core 2 Duo, 4 GB of RAM and a 120 GB HDD. Not a ton of power, and not a ton of hard disk space (probably have 30 GB free). This computer is running OSX Lion, as well. What's the best way (virutalization or BootCamp?) and VERSION of Windows to run on this machine, for maximum stability? Will only be using for QuickBooks Pro (the Mac version sucks and doesn't have the features needed). Many thanks!