Office 2003 updates fail

[Nigel Barton]

Since installing Office 2007 Beta alongside Office 2003, updates for Office
2003 always fail, as below:

Security Update for PowerPoint 2003 (KB923091)
Security Update for Office 2003 (KB924424)
Security Update for Excel 2003 (KB923088)
Security Update for Office 2003 (KB923272)
Security Update for Word 2003 (KB923094)
Update for Office 2003 (KB923097)

Any ideas would be welcome.