HELP please

[helpman]

I can't install Office 2007 because when I did a system restore, it landed me somwhere that was between the installation and reboot process of the older Office 12 and it corrupted the System Restore CAB files so I can't go back and restore to an earlier point. I susequently used crapcleaner programs and cleared the Office 12 registry files that were in the registry at the time. (I'd doubt an overwrite would would [registry, remember], and please don't say "It's a beta and it's your fault" thing) Thanks.
Please help me!

[Miz]

Try the Windows Installer Cleanup Utility (http://support.microsoft.com/kb/290301/l).

It does not remove files, which have already been removed; it removes the program's Windows Installer configuration information which may be what's stopping the reinstall of Office.