FS9: event handling or dynamic start of "AI"

Hi,i have designed a vitual Camp in the middle of no where for Transportation usage.One can use it as amilitary camp or as an oil-field exploration camp. It is situated in DA = Algeria, in the middle of Sahara, something in the middle of DAAT and DAUI.The reason behind of all that was originally some problems with missing VFR Navaids.Now, that "Camp" is working pretty well. So far no problem.What I would like to do: If I fly in with an airplane it should generate an event, that could be used to start some "AI" action at a different point.Some situation like that: If you enter a zone of 40 Miles, or something like ETE >= 35 Minutes away from the airport it will generate an event, that can be determined within FS9.Any clues if it is possible to trigger such an event?I could imagine an event to cross that 30 miles boundarys of scenery or something similar.The output should be to start AI at completely different point. Aim:If an airplane narrows the airport then the narrow hills will be settled by "Cars".How to do that I have got a clue. I am just asking if it is possible to get an event from the engine.Christian