When I tried to install this disk, the installation hung, and I had to abort.
 Now, when I try to re-install, I get a message that it is already
installed, and that the installation will be halted.

I have checked all my files, and cannot find any trace of this program being
in my system.

It does not show up in my program menu, nor in the add/remove menu.   Also,
when I do a search, nothing shows up.

What can I do, to properly re-install this software?

Thank you very much.

Ken