No. You'll have to go out and purchase a conventional
"Full Version" of Windows XP Professional and perform
a "Repair Install" using the new CD and Product Key.
If you have an illegal version of XP Pro, then you'll
need a "Full Version" of XP Pro to perform a repair
install. XP Home cannot be used in this case. The
only way to use XP Home would be to reformat your
drive and perform a "clean install".