Well guys if there is the ability to sound mod I will definately make one that will refit the external sounds, flypasts and weapons plus the system sounds etc.

Can someone have a look to see how the sounds are stored in the game, look to see if you can find any folder(s) with sound files inside relating to the aircraft.
If so a straight switch usually works. If not, then they will be packaged inside data archives or cabs probably, so an SDK kit is needed to unpack and repack the archives.