I am assuming the 2 additional AV ports on the D3 are three composite connections video, l audio, and r audio on each. Would it be possible to connect my Zune to this via the proprietary zune connection to rca cable I got with my zune home stereo integration kit. I can play the zune on my t.v. so I am assuming this would work the same on the D3. I do understand I will have to control playback from the zune itself.

I am also already aware the ms$ zune is a piece of crap and I am a loser for receiving it as a gift. No comments necessary regarding my ownership of said piece of crap.

If this works I am also assuming I could hook up one of those joystick style game controllers made for direct connect to tv. I just wanted to confirm both of these would actually work before I tore my car apart again.

Sorry if this question has been asked before I could not find it in my searches.

Yes, it works just like a normal television input. Any audio/video with RCA outputs will work on it.

grab 3 female-to-female RCA adapters and a RCA to mini-jack AV cable. that way you can plug right into the front AV input and not mess around with the rear RCA's.

^ you can do that... but then you have a cable hanging off the front of your stereo. I think it's a much cleaner install using the rear inputs. Because you can then run a short video patch cable to wherever you need it, like the glove box or center console, and plug whatever you have into it there.