Have you tried to make ME play the files yet? Generaly, If you can make WMP9 play the files, ME will play them too. Just add the filetype to the list of valid extensions in the setup menu. That should allow you to play them.
You probably aren't going to get full support for it in ME. It's a lot of work to code in support for unusual formats that may or may not go anywhere. If it ends up that this wrapper is the next big thing since AVI then you'll end up getting your support. If it fails, then your SOL.