Hey Emb190,
Here is a link at FreeFlightDesign on the parts (programs, etc) for Gmax to get it fully exporting;
http://www.aerodynamika.com/cgi-bin/yabb/YaBB.cgi?num=1094772173
Here is another for tuning (controlling) MakeMDL (if you dont have MDLCommander installed). Really a cool little setup.
http://www.aerodynamika.com/cgi-bin/yabb/YaBB.cgi?num=1079043726
Once you have everything setup for MakeMDL, then in Gmax, you have your model selected, and click File/Eport, select Type to be Aircraft Model, give it a name, export location destination, then click OK.
It will give you warnings now if there are issues, such as a part that is out of scale that is a animated part. If you get past the warnings on the first try, you did good.
Next, MakeMDL should bootup automatically and burn the model for you. If you dont have a config file, then you will not have certain parts work properly, nor have reflections occurr. You need to make that config for MakeMDL or find/install MDLCommander.exe to enable MakeMDL to stop before burning your model in order to allow you to make the proper selections. (No one seems to know why they made it to have options and yet you cannot select them).
You will then have a MDL model created, such as 'my model.MDL'.
Next, make a complete model folder setup with panel, model, texture, and sound folders within it. Set up your "My Plane.air" file and your "Aircraft.cfg" file. Drop your MDL file into the model folder and config your "Model.cfg" file to read 'your' MDL file, (use Windows Notepad to Edit your CFG files).
Make sure to put in the basics for your plane in the registry section of your aircraft.cfg file;
ui_manufacturer=Monocoupe
ui_type=
ui_variation=110 Special
With that, you should find your plane in FS. From there, you will need to set up all the various data for it in your Aircraft.cfg file (such as contact points locations, lights locations, view point, etc).
Once you do your first couple of planes, setting up the folders, you get pretty fast at it. The first time is a bit frustrating though, so dont expect it to show up perfectly proper the first time. You have to set it all up first.
Try using a airfile set that is very similar to your plane. That will help out drastically. You can make a Cessna 172 airfile set into a low wing tail dragger, so no worries. Much flexibility.
Let us know how you do.
Bill
LHC