I have my daughters old Sony Vaio vgn-n320e. It originally came with Vista, however,she had a friend downgrade to xp. I think he formatted the harddrive as there is no boot part. I am also not sure if he used a sony disc for XP either. Should i buy the rec. discs for xp or vista. if xp which drivers do i use xp or vista. Can I upgrade to Win 7 with this model, i believe it came with 2 g ram. Thanks