So far, so good.
Then, I wanted to edit the airlines.cfg file so that ATC would recognize more airlines outside of the default using the same process above (ediut, restart, check, exit).
Somewhere along the line, FSX stopping loading up. It just would hand forever on the startup image and stop responding requiring a force close to exit.
So, I replaced the airline.cfg file with a copy of the original, restarted my computer, and no luck.
So, then I uninstalled FSX and all add-ons that had a separate install/uninstall, and did a full reinstall from DVD (FSX Deluxe Edition) followed by installing SP1 and SP2. Still no luck.
So, then I did a repair install from DVD without uninstalling first. Still no luck, and I am noticing I am getting the same error all the way through:
SCENERY.CFG file error. Local scenery directory (Addon Scenery\SCENERY) in scenery Area.115 not found. Click OK to continue.
Well then... I cannot even locate this file directory period. A quick search around the Internet, and reading through several trouble-shooting forums later, I find you can remove this error by adding the file "Addon scenery" to the FSX root directory, and then in that folder adding two more folders, "scenery" and "texture".
So, I did that, and the first error went away. But, now when I try to run FSX I just get a fatal error and Windows closes FSX. It simply will no longer run.
I am approaching panic mode...