DTXBMP
You will need this program to open and save texture files that work in FS. This file format saves the "alpha" or transparency layer .   
 
Gmax 1.2
The 3d modeling program for building scenery and vehicles, which can then be exported for use in MS flight sim. This is the essential tool if you want to build  your camp. IT IS ALSO ON YOUR MS FLIGHT SIMULATOR 2002 CD. (pro edition)

Developer downloads.
stacks of useful stuff to keep you busy.
gmax tutorial
Not a bad tutorial.  Strightens out the learning curve  (you should have MakeMDL plugged in to Gmax.)
makeMDL 
Exporter utillity for Gmax that creates  FS friendly files. (makes life alot easier.)
Click here to Upload files.

Send tested and zipped files as an an attachment.
Make sure the zip contains:-
1.)  all the texture Bmp. files.
2.)  the Bgl. file.
3.)  a brief "read me" file with a short  description and lat/longitude.

Thanks.
downloads