Rear warning sensor question ? vag com mod

When I back up, I usually let the clutch out just enough to get the car going and then put it into neutral (clutch out), drifting as far as I need to (especially backing out of my garage/driveway which goes down hill a bit). Otherwise, I am moving backwards faster than I really want to (I rarely find myself backing up any great distances). I have noticed that my back up camera stays on until I start moving forward again, but the rear sensors only funtion when the gear shift is in the reverse position. This puts me in a situation where I can't rely on feedback from the sensors. Is this how everybody's rear sensors work, and I wonder if it is alterable via vag com. Aerodave to the rescue!!!