i have disks for XP and Vista and i just wanted to know what would be the best one for dual booting my 2011 macbook pro. i will only be using it to run office because i dont want to pay for the mac version and maybe a few other windows only programs. i dont want to take up too much of my hard drive so what one would take up the least amount of space? also what one would work better for me in the long term?