I'm not aware of a Pioneer version but it probably exists. Remember we are trying to make an empeg look like a CD changer to a standard head unit. We aren't trying to drive a CD changer with an empeg although in this case it would be quite easy due to the IBus used in BMWs.

As for controlling playlists (my take anyway), I plan on mapping the 1-6 buttons onto the buttons to control the empeg. Then I think a remote display and an IR extender for complicated stuff.

I already have next/prev track type stuff working, although the headunit is muting things for some reason since I'm not appearing exactly how it expects the CD changer.