Using wad Super forms in single player.

Well I've downloaded a couple of wads that are supposed to have their own super forms, but as far as I can tell the game only allows sonic to transform in single player. Am I just doing something horribly wrong? Or is there really no way to turn Super in singleplayer for downloaded characters?

This might be the same thing here:
http://mb.srb2.org/showthread.php?t=40072

Bleh i was afraid of that. Oh well, it looks like the script isn't too complicated. Hopefully since match supers are on the way out there will be a better way to use super forms next version.