im going to be using my iphone with my avic D1 soon using the a/v composite apple cable, and the a/v input on the back of my D1. My question is, if i have a passenger, they will probably want to watch movies on it which is fine etc, but what about when im on my own, i kind of wanted to use the iphone as the ipod, and play music through the a/v ports. Im assuming this would work, but im just wondering now, will the sound keep playing music on my d1, even if i switch to the map mode if i need navi? or do the a/v inputs only work when the D1 is on a current screen?