Actually ROG, it was a Prophet 5 synthesizer. Yes, V and 5 are usually interchangable, but not in this case, because the Prophet 5 was the actual analog hardware synthesizer, and the Prophet V is a software emulation made by a company named Arturia. It's a good emulation, but it simply wasn't out at the time Creepshow was made.
Sorry for nitpicking, but synthesizers are my life, man! :3