That reminds me of the old FS 4.0 tool, Aircraft and Scenery designer...
From within FS you could create buildings, size them, give them height all while in map mode in FS 4. There has never been a tool as simple as that to use to this day. In at least one way FS 4 is still superior to FS5, 5.1, 98, 2000, 20002 and 2004!!!
If we had a tool that would allow us to design within the FS engine, maybe with a simple preview window so we see FS in one window and the preview data in the 2nd window... As we know new sceneries can't be loaded until FS is restarted, unlike FS4.
The tools as mentioned, AFCAD, AI Flight Plans, Parking Codes, Roads and Rail Data, Object Library, all the necessary stuff that we need to:
A) Build an airport - i.e. frequencies, runways, taxiways, buildings and airport objects
B) Build roads around the airport
C) Move or delete default objects in the scenery
D) Build other buildings near the airport
E) Define autogen layouts for photoreal textures around the airport, or region (i.e. if you are using photo mapping)
F) Design airways and airspace
G) Design SIDS and STARS for airports
H) (this one might have to come from MS) - A tool that can work inside FS manipulate and create items within FS, protected memory for FS modules, where one module in FS can be shur down and restarted without having to exit the program... e.d. you design a building in FS and want to compile it and see it without having to restart FS... The Super Design module would shut down the scenery.dll and reboot it while keeping all the other modules up...
It might even be possible to preview items in design mode within the scenery by the use of Direct X, you set attributes for what you want to place (such as a building)... The design module will overlay a transparent rendering of the object over the image generated by FS and blend the two images together to get a rough preview. When satisfied hit the compile button, the design module then shuts down the scenery engine, compiles the new scenery, and reboots up the scenery engine when complete....
In fact ditch the 2 window display, just have the preview as a direct X transparency overlay over the FS generated image...
Sorry, the older I get the more I am starting to think outside of the box... Must come from my Mac days...
Think FS Different!!!