Hi Wombat,
I would suggest that you remove all versions of Office and then reinstall
them.
Please follow these steps to totally remove Office.
Remove Office 2000 and Office 2003
=========================
To remove Office 2000 and 2003 and any stand-alone Office products that may
be present on your computer, follow these steps.
Microsoft Windows XP
==============
Click Start, click Control Panel.
Double-click Add or Remove Programs.
In the list of currently installed programs, click Microsoft Office 2000.
Click Remove.
Click Yes to confirm.
Repeat steps 3 through 5 for Microsoft Office 2003
Repeat steps 3 through 5 for all stand-alone Office products that are
installed on your computer.
Delete Office Folders
==============
Start Microsoft Windows Explorer.
On the Tools menu, click Folder Options, and then click the View tab.
Click to select the Show hidden files and folders check box, and then click
OK.
Delete the following folder:
C:\Program Files\Microsoft Office
Locate and open the following folder C: \Documents and Settings\All
Users\Application Data\Microsoft\OFFICE\DATA\
Delete all folders and files under data
Delete the .tmp Files
==============
Quit all the programs that are running, and then restart your computer.
Click Start, and then click Run.
In the Open box, type %temp%, and then click OK.
Press CTRL+A to select all files, and then press DELETE to clear the default
Temporary folder.
Note You cannot delete files that are being used by currently running
processes.
Rename the Config.msi Folder
====================
Start Windows Explorer.
Rename the folder Config.msi to Config.old.
This folder is typically located at the root of drive C, for example;
C:\Config.msi.
On the Tools menu, click Folder Options, and then click the View tab.
Click to clear the Show hidden files and folders check box, and then click
OK.
Remove Office-related Keys from the Registry
==============================
WARNING: If you use Registry Editor incorrectly, you may cause serious
problems that may require you to reinstall your operating system. Microsoft
cannot guarantee that you can solve problems that result from using Registry
Editor incorrectly. Use Registry Editor at your own risk.
Click Start, and then click Run.
In the Open box, type regedit, and then press ENTER.
Delete the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\Office
-and-
HKEY_CURRENT_USER\Software\Microsoft\Office
Run eraser2k.exe
=============
Go to the following website and download and run eraser2k.exe:
http://support.microsoft.com/default.aspx?scid=kb;en-us;239938
Run Office Setup for both Office 2000 and Office 2003
=================================
Go to the following website and follow the steps to install both versions of
Office:
Information about running multiple versions of Office with Office 2003:
http://support.microsoft.com/default.aspx?scid=kb;en-us;828956