Assuming you have the FS9-Gmax gamepack installed properly, when you exported your scene as an FS9 Scenery mdl, you should have two files in the directory you exported to. One named myfile.xml and myfile.mdl (replace the myfile part with what ever you named yours).
Start Windows Explorer and navigate to the directory you exported to. Open the myfile.xml file with a plain text editor like notepad and remove the comments to establish the location for your scene. Something like this:
<?xml version="1.0" encoding="ISO-8859-1"?>
<FSData version="9.0" xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation="bglcomp.xsd">
<SceneryObject
lat="47 25.89"
lon="-122 18.43"
alt="0"
pitch="0"
bank="0"
heading="0"
altitudeIsAgl="TRUE"
imageComplexity="NORMAL"
>
<LibraryObject name="10FCAE12464AE50E70C095B347C2E473" scale="1.0" />
</SceneryObject>
</FSData>Once you have the xml file modified save and close it.
Now, you need to have BGLComp.exe either in the current directory with your other files
OR in a directory that is in your path environment variable like Windows or WINNT (so you can call it from anywhere).
If you have BGLComp.exe in the same directory, you can "drag and drop" myfile.xml onto BGLComp.exe.
I have mine setup with a link in my Windows Explorer right click menu so I can open a Command Prompt window and then simply type in
BGLComp.exe myfile.xml at the command prompt.
Once the compile is finished you can simply move the finished
myfile.bgl to your ..\Addon Scenery\scenery directory if it is not already there. Be sure any textures are in the ..\Addon Scenery\texture directory.
Start FS9 and go to the location for your scenery and check it out.
Lou