Ok guys so here's the issue. I have a 2008 mac pro which is being replaced with a 2009 Mac Pro. I currently have Windows XP Pro 32-bit installed on a 150GB Bootcamp partition. My question is the following. Can I install Windows XP on my new Mac Pro with the same registration key. I bought the Genuine Windows XP Pro direct from Microsoft and it only came with one registration key. Please help.