My current MacBook HD is running out of space fast I've loads of stuff on there. After seeinghttp://guides.macrumors.com/MacBook_Upgrade_Guide I've been wondering about putting in a new HD, but I've a few questions. 1> What is the max size of HD I can install I'm looking at 100G or more. 2> I've only got the restore disks that came with the MacBook, is this enough to reinstall OSX from an non-formated HFS+ disk? 3> Does it really work? Or will I just be wasting my money? Thanks in advance for any help.