The XP product key "changer" that's linked on the page is strange. It's actually a batch file which is compressed in a RAR self extracting archive which is then compressed again by the UPX executable packer. All it does it print out a list of serial numbers and change the value in the registry for how long you've got until you need to activate XP. I wouldn't hold much hope for any of these corporate keys to still be working by the next service pack

Doesn't really affect me as I've got a legit copy of XP Pro from work. If anybody ever wants to buy XP Pro then get the OEM version. It's half the price of the retail version but it's still £100 though.

- Trevor