Most of my fictional scenery is somehwere on a piece of land that exists in real Earth, HOWEVER, my most frequently used scenery (one I fly to most often), is the Pluto Interplanetary Airport, which is located at a latitude of 78* 15', to at least partially simulate the lighting conditions of real Pluto. It is a largely unfinished scenery, but I do have a functioning airport (ILS, fuel areas, etc.), along with major roads and 9 tall skyscrapers, right next to the ILS path of one of the runways (which would cause a 747 to get it's wing chopped off in real life, but I'm planning to reduce the height so the 'scrapers are "747-friendly").
I'm just now working on it in AFCAD. Looks good so far. AFCAD suggests that I slew around things to place things, but instead, I'm using Airport, which I used to create Pluto, to get my coordinates.
My next Question: How do I get my airport to display on the gps? Or does AFCAD do that for you?
EDIT: Nevermind about that last part, I figured it out.

Now, my next dilemma, is getting all those ATC frequencies on the scenery... Does that depend on how much traffic you give the airport? Or do you need to add the multiple ATC frequencies manually?
System Specs: HP 2000 Notebook PC; Windows 8.1 64-Bit; 4GB RAM; AMD E-300 APU w/ Radeon HD Graphics (2 CPUs), ~1.3 GHz; AMD Radeon HD 6310.