OK, I have it installed and I just exported my test project (even though it was no where NEAR ready to be exported). Just a question - in a specific aircraft's folder in FS9 what is the .air file and do I need it to put a plane in FS9?
EDIT - Let me rephrase that. What program(s) can I use (if they exist) to create and/or edit .air and .cfg files for planes that I create for FS2004? (I'm the biggest n00b in the universe!!

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The .air file gives the model it's specific flight characteristics, for example singe engine prop, or jet engine, helicopter etc. The .cfg file is where you will do most of your performance traits editing, you use .air files to distinguish the aircraft's proffered flying qualities, which can always be swapped with a similar aircraft. For example, switching a 737-200 air file with a 737-700, they are different aircraft but share similar traits, two jet engines located under the wing etc. For designing models, you can use several programs, i.e. Gmax, 3dsmax or FSDS. Your on the right track with questions.
The best place, where you can teach yourself (which is best to do) is here,
http://www.simviation.com/gryphon/tutorials/gMax_00.htm-Good Luck! -SN 8-)