Wasn't that the good old FSTraffic? You used to record a flight departing from the stand, take off and fly away for eight or nine miles, then do the same for an arrival. The program would randomly pick an aeroplane from a small, medium or large category and fly them in and out of the desired fiels at a rate chosen by the user. It was great in its FS98 day but AI traffic is much more flexible and ultimately easier to achieve the desired results
cheers
Fraser