I want to put Windows on my 2008 iMac just so I can play one game (Star Trek: Armada II). I'm in college now and was able to buy the full version of XP for $14. I was assured by the campus store that this was the full version. However, when going through the Bootcamp process it comes to a screen saying there is no previous version of windows installed and the disc inserted isn't a full version. I know this is a sign that I purchased an upgrade disc, but the store staff, who I'm friends with and work with on a daily basis, assured me it was. However, they haven't had them in stock in awhile and I was the first person to buy one so there could have been an ordering mistake. The disc says 'Windows XP Professional with Service Pack 3 (Volume License Product Key Required)'. I just erased my computers hard drive so it might not be completely up to date, I don't know if there was an update that addressed this or not. I also didn't know if I had to register the software with the product key or something before it allowed me to install it. Sorry, I'm not 100% computer savvy, especially when it comes to Windows. Any help would be greatly appreciated.