The whole Hollywood aspect in SC4 is severely lacking, thus I think it'd be a good idea to have a large and easily customizable movie studio set, as opposed to the one ingame, for anyone who would want a movie-geared city of their own.
I'm not sure if it's exactly what you're looking for, but there are several movie "sets" done by shmails available on the STEX. I remember a Western set lot, and believe there are several more themes to choose from.