I'm going to get a mac pro soon and was thinking of installing an extra HD for windows to play games in bootcamp. 1. Which version of XP is good for this, pro/home? is there a difference? 2. Where is best to buy Xp online, ebay on the marketplace? 3. Is it a good idea to have a HD just for windows booting to stop corrupting my mac side? and which HD would you recommend?