Office 2003 upgrade to 2007

Hi guys,

I have read the Microsoft Office 07 deployment through Group Policy guide.  It mentions that Office 07 can only be delivered through computer GPOs and can only upgrade Office 03 that was also deployed through a computer GPO.  In all other situations an Office 07 deployment could result in a computer having side-by-side installations of both Office 03 & Office 07.

Our Office 2003 was deployed manually to the workstations, so does anyone have any ideas of how we could script  something to remove 03 and then allow us to deploy 07 through a GPO?  I have looked at the Office07 setup.exe /uninstall options, but that requires a Product ID as well and I am guessing our Product IDs will probably be unique and tough to script since the installations came manually.  Anyone have any other ideas on this?

Thanks,

Dan