Ok, so this is what you have to do
@echo off
Echo Uninstalling previous version of Office - Please wait
\\servername\shared directory\Office\Removal\offcln.exe /a /q
echo Installing Office 2003 - Please wait
\\servername\shared directory\office\setuppro.exe TRANSFORMS="\\shared drive\shared directory\office\2003.MST" /qb-
Echo Done!
echo Office XP Uninstalled >> c:\done.txt
echo Office 2003 Installed >> c:\done.txt
where the removal executable is from the Office resource kit from microsoft. This works like perfect, no problems.