Hi John:
I recommend (at least initially) following the suggestion by Tom Gibson here:
https://www.fsdeveloper.com/forum/threads/aprons-order-problem.435906/post-729781
Please use ADE version 1.79x, as this version adds a few useful functions.
https://www.fsdeveloper.com/forum/threads/development-version-1-79-7475-available.448076/
In ADE FS9 mode:
ADE Menu > Project > Backup > select target output path for a ZIP of the source and output folders of the current ADE project
...
Then:
1.) Click on the boundary of your (currently assigned) Concrete Apron to Select it
2.) Right-click on that boundary
3.) With that boundary selected, in the pop-up context menu, click on Edit Object
4.) In the Properties dialog box for that object, change Concrete to Macadam
5.) Click [OK] to apply that change
6.)
Next:
a.) ADE Menu > File > Save Airport
b.) ADE Menu > File > Compile Airport
c.) Copy resulting BGL(s) to target output path of the project Area layer set Active in FS9 Scenery Library GUI
d.) Paste the resulting BGL(s) into the \Scenery sub-folder locally paired with the \Texture sub-folder in that ADE project's Area layer
7.) Delete any earlier versions of (only) the
airport project BGL in that \Scenery sub-folder locally paired with a \Texture sub-folder
8.) Re-start FS2004
9.) See if you are willing to make do with the Macadam texture
10.) If Macadam texture and/or its "
GroundRoll" attributes of gear animation / sound is unacceptable, more modifications may be used.
Those modifications would involve either:
Deriving a copy of the ADE "Concrete" Apron XML, processed via MCX Menu > Special Tools > "
XML Apron to SurfaceType converter"
...
or:
Appending / editing the Airport Boundary Polygon from FS9's default PADQ {Land-} ClassMap object via SBuilder for FS9 (...located in: )
[FS2004 install path]\Scenery\Namw\Scenery\
AB907110.bgl
The latter would be a multi-step process to output compiled BGLs for a edited version of that AB Polygon, and an Exclude for the default.
I have attached below, a 'worked example' of the first procedure above in an edited copy of your ADE
*.AD4 project file.
Open that
*.AD4 project file in ADE, and you will see that the Concrete Apron has been edited to use the Macadam attribute.
If you wish, you can compile that
*.AD4 project file on your own ADE9 installation, and use the resulting BGL(s) as described above.
I have also attached below, a screenshot of that 'worked example' of the first procedure above in FS9.
Feel free to let me know how you might wish to proceed with alternatives- and/or additional enhancements- for your project.
PS: There is still a lot of fun to be had in FS9.
But have you considered treating yourself to a computer that runs an install of MSFS 2020 Deluxe / Premium after years of hard work?
GaryGB