Sound for rear perspective of aircraft

From memory, Flight Unlimited III faded in certain sounds depending on what camera perspective the angle of view was at when at an external aircraft view. At the front you'd hear the drone and whine of an airliner's engine and at the rear you'd hear the air-thrust being produced, and it faded from one to another as you rotated around it.Does anyone know how to get this happening for FS2002, if it's possible?Thanks to anyone that can help,Rotorhead.