[Ned Scott]

Sounds like you have the right idea. Just to clarify, I assume you mean: Export using multiple files, then it will give you .nfo files for all the movies, and add the set tag to those newly created nfo files for the Disney movies. In Files view, select that Disney subfolder, set content to "none" and tell it to update the library, removing them. Then set content on the Disney subfolder again, run automated scan, and it will re-add the movies, but using the nfo files.

Another idea would be to still use smart playlists, but create two. One for Disney, and one for everything but Disney. Then use a skin that supports custom main menu/home buttons (I personally really like Transparency) and point to those instead of the "real" Movies button.