Can someone tell me how to create flightplans for my AI aircraft?

This is about the best tutorial available - now that the Jet Doctor files are gone from the net.http://www.flightsim.com/cgi/kds?$=main/howto/ai4beg.htm

But that is for FS2002 not FSX. I think the folders have changed and that it is different.

Same basics still apply.The Scenery/World/Scenery folder is still there.You can have multiple traffic files - so you can name your source files something like:aircraft_Test.txtairports_Test.txtflightplans_Test.txtHowever, when you are testing your first AI traffic files, you do not want any other AI flying.Work on and learn the basics, then you can scale up your knowledge to the changes in FS2004 and FSX.The TrafficTools Help file is also a very good source of information.