Audio book(s) help needed

Overdrive Media doesn't recognize my Zune, so I can't transfer any audio books from the library to it. (My own fault for not checking--I just thought since they were Microsoft encrypted files, that a Zune, of all things, would play them!)

All of the files from the library are DRM/WAV. or WMA. files. I have them already on a tiny MuVo (Creative Zen), but I can't move them. Any ideas?

Did you figure it out? If so, I'd love to know. The folks at Best Buy assured me that the zune would do this.