I've been using Ubuntu (Linux) for five months and now I want to put XP Pro back on my system. I have a legitimate key on a sticker on the tower from when I bought it but the actual CD didn't come with. How can I get a copy of the CD to install? I've heard you can make an XP LiveCD, could I install it that way? (my parents' computer has the same edition of Windows) Could I downloads a CD image illegally but use the legal key to install it? I have an XP Home CD and key, is there really that much of a difference between Home and Pro?