In that case, no, it's not going to work. The "receiver.arf" is the server-side file which contains the downloadable player application for a real Receiver: it sounds as if Medianet works by serving an alternative player application customised to its own server. Receiver Edition car-players don't touch "receiver.arf" and always use their built-in player application. So it looks like you should cross Medianet off your list.

Peter