I think somebody already suggested that one a while back, but for
some reason I had to think about how to map these casts to each
other.

Frank N. Furter - Ranma, obviously.
Janet Weiss     - Kasumi.
Brad ?          - Toufuu-sensei.
Eddie           - Ryouga.
Riff Raff       - Gosunkugi.
Magenta         - Kodachi.
Wossname (Y'know, thingie... Little Nell's Character.)
                - Nabiki (I don't know, somehow I can picture it).
Dr.von Scott    - uh, Tough.  Souun, perhaps?
The Narrator    - Oh, another Toughie.  Genma?

             and

Rocky Horror    - Shinnosuke.

Of course there would have to be songs...


Sebastian (Who can go back to his *real* writing, now that this is
out of his mind)
-- 
       <http://enterprise.mathematik.uni-essen.de/~bastian/>
                         Comics reviewed 
-- 
I profoundly believe it takes a lot of practice to become a moral
slob.
        - William F Buckley