Redeploy WINXP Pro License/Install to Different Desktop?

I would like to upgrade Desktop A from Win XP Pro to Vista Preimuim. I would
then like to install my legtimate, registered copy of WIN XP Pro onto Desktop
B which is running WIN2K.

How can I ensure the new install of WIN XP Pro on Desktop B is able to
successfully go through the online registration process afterwards?

Provided its a retail edition simply reinstall if you cannot use online
activation use phone and state that you have retired the origonal sys.
Strictly speaking the winxp is part of your Licence for the upgrade Vista,
and as such should not be used elsewhere.
However I understand the activation of the Vista upgrade editions is far
more stringent, and as such it may hold the key of qualifying version in its
activation process.
You would be beter advised to post to a Vista specific ng

"Legionnaire" <> wrote in message
news:CB58181D-063F-4336-8280-...
> I would like to upgrade Desktop A from Win XP Pro to Vista Preimuim. I
would
> then like to install my legtimate, registered copy of WIN XP Pro onto
Desktop
> B which is running WIN2K.
>
> How can I ensure the new install of WIN XP Pro on Desktop B is able to
> successfully go through the online registration process afterwards?