Windows for Mac download?

I had Windows XP, but unfortunately my genius father threw out the discs (from my old desktop) thinking it was pointless to keep. So I still have the product keys (I was smart and e-mailed them to myself a while back), but no disc. Is there anywhere I can download the installer to burn to a disc and use with BootCamp?

You can try contacting Microsoft and see if they can send you replacement discs. All you would have to do is tell them the product key you have, and they will verify that it's valid. Or, if your friends have XP, you could borrow their disc and use your key to install it.