OK, I had an unrelated problem with Windows installer and I had to fix it, so I thought that would fix this problem too.

Now when I try to add Office Tools I get error 1731: The Source installation package for the product Microsoft Office 2000 SR-1 Premium is out of sync with the client package. Try the installation again using a valid copy of the installation package.

I googled it and apparently the problem is usually that the version of Office installed is different than the one on the CD. I dk how that is possible, but I really don't want to uninstall Word and reinstall. So I will bite the bullet and try to repair it first. That will dump a lot of Office unnecessary stuff that I really don't want, but I guess I'll have to tolerate it.