My guess is probably not, but if you do really have a new SP2 key, call up Microsoft, they'll validate it, and then ask them to send you a new disc. It'll be a little bit of money out of your pocket, but you won't be paying for a new license and a new copy of Windows. It's something like $15-20 I think for a new disc as long as your key is valid. Either that or find a friend/coworker/colleague with an XP Pro SP2 disc that you can borrow, then install with that and use your key.