assume i buy the stock 320 gb drive.. and add a 500gb drive.. standard 7200rpm drive that is. 1) is it possible to boot OSX off the 320gb, and windows vista off the 500gb? 2) is that recommended? OR partition the 320gb drive into 2, put half to boot OSX, and half for Vista. and keep the 500gb to data? Pls kindly advise.. thanks!