What is a motion menu ?
My reason for asking (besides being an ignorant) is that I know that Roxio Videopack does VCD/SVCD menus where you can have animated areas (small videos) acting as hot spots. Is this what you want ?
Look under the authoring section, and a guide to a program called TSCV which I believe is a freeware program. The Roxio program might be much easier to use, but this one will make your motion menus and a ton of other goodies.