Is it possible to change any setup in order to access my phone through the nav. display and not the radio screen? Also what about terrain respone info... ive read in the handbook that info should appear on the nav. display but it seems that doesnt work on my rrs.

The first answer is no, sorry. The only phone-related thing you can do with the touchscreen is memorizing phone numbers into the voice recognition system. For everything else that interfaces with the phone, you have to use the radio LCD.

Regarding TR info on the touchscreen, you should have a "4x4 Info" button on the main menu of your monitor, press the right hard button under the monitor to bring up the main menu and then the 4x4 Info button on the touchscreen. TR feedback should appear there.