Office XP to Office 2003 thru admin install point

[Marcio Kleemann]

I have Office XP deployed to our PC's through Group Policy and an admin
install point on our server. I now have the CDs for Office 2003, and would
like to setup an admin install point for it and deploy through gpo. My
intent is for Ofc 2003 to upgrade Ofc XP, and not to install a second copy.

I'm looking for some guidance on how to go about this. I think that if I
create a new admin install point for Ofc 2003 on the server and then add
that to the gpo, then it would have both XP and 2003 assigned to the PCs. On
the other hand, if I were to remove XP from the GPO, and then add 2003,
wouldn't it unistall XP from the PCs (and thus all the user's settings and
files), and then install a fresh 2003?

Thanks in advance for any suggestions.