I currently have a Viper alarm on my truck with remote start, tilt sensor, glass and shock sensors, hood an trunk, motion detection, and the list goes on. It was about $600 alone with all the add ons. So to put that in a temperamental beast like the 7 series, I can only imagine the kind of work involved. props to you and I can't wait to see it when it's all done.
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold & new owner totaled it 4 hours later)