FrontPage won't run or reinstall after Windows 98SE reinstall

After many system problems, I recently reinstalled Windows 98SE and created a
new registry. Of course, this has meant reinstalling the applications to
create entries in the new registry, even though the program files are
still on the hard drive.

But FrontPage 2002 won't reinstall. I'd purchased the upgrade version, for
FrontPage 98 (and long-since pitched the FP98 disk). The FrontPage 2002 disk
starts Window Installer, then halt with the message: This patch package
could not be opened. Verify that the patch package exists and that you can
access it, or contact the application vendor to verify that this is a valid
Windows Installer patch package.

Trying to start the existing installation of FP2002 directly from
frontpg.exe, it halts with the message: A required DLL file, fpcutl.dll, was
not found. (The file actually DOES exist in the Office10 subdirectory, but
obviously the necessary registry entries to find it are missing.)

Suggestions on how to proceed? TIA!