1. You can't see your movie and nav at the same time. you may hear the audio but if you pick nav you get nav video if you want to watch a movie either dvd or ipod this is the only source you will see So NO SPLITSCREEN if that is what you want.
2. There is no integration between the addresses and Nav through your cell phonebook. You can upload your phonebook but it doesn't correlate to the nav. Also I think the unit will only hold 100 maybe it's 300 numbers so if your like me you won't have them all. I created a category in my cell phone and added all the numbers i wanted to sync to the DNX