Office2007 upgrade fails

Tried to install the Office2007 cd and got told that I already had beta 2007 components installed (which is actually the Expression Beta) as per the error "Setup is unable to proceed due to the following error(s): The 2007 Microsoft Office system does not support upgrading from a prerelease version of the 2007 Microsoft Office system. You must first uninstall any prerelease versions of the 2007 Microsoft Office system products and associated technologies. Correct the issue(s) listed above and re-run setup."
Several blogs later (funnily enough the first response in google was Scott's page which I already read on a daily basis) I followed the instructions at http://support.microsoft.com/kb/928218/">kb928218 and removed the Expression Beta (which I had already removed from Add Remove programs and the My Uninstall program)