bhunt3450

I cross posted this in the F150 forum before I realized there was a Super Duty Forum, but got no answers to most questions. Hoping someone can help me out...

I have a 2007 F250 Lariat Super Duty and the previous owners removed the factory 6-disc changer and put a single DIN aftermarket radio in it. I'm not a fan of aftermarket stuff, so I've been wanting to get a factory stock radio back in it and thought about upgrading to the touch screen navigation for the same year, so it appears stock. I know the touchscreen radio also came with a factory amp and subwoofer, but I don't have those and don't plan on putting them in. Is there a way the dealership can program the touchscreen to work without the amp and sub? Also, my truck has steering wheel controls for the factory radio, will these be able to be used if I upgrade the radio to the touchscreen? Last question, I have an airbag light on on my dash, code pulls as a loss of communication at the bottom of the steering column. Could this be due to the aftermarket radio interfering with the steering wheel controls?