Greetings --
Assuming a retail license (OEM licenses are _not_ transferable),
simply remove WinXP from the computer it is currently on, and install
it onto the new one. If it's been more than 120 days since you last
activated that specific Product Key, you'll most likely be able to
activate via the Internet without problem. If it's been less, you
might have to make a 5 minute phone call.
Here are the facts pertaining to activation:
Piracy Basics - Microsoft Product Activation
http://www.microsoft.com/piracy/basics/activation/
Windows Product Activation (WPA)
http://www.aumha.org/a/wpa.htm
Bruce Chambers
--
Help us help you:
You can have peace. Or you can have freedom. Don't ever count on
having both at once. -- RAH