Great stuff. Glad my tips helped.

The best method for "static" aircraft on your airport would be to add them to the AI traffic. IMHO
You can use TTools (Traffic Tools V2 by Lee Swordy) to add your 3rd party aircraft & create the traffic tracks for them. Define the parking ramps, taxyways etc on your airport with AFCAD. This was what it was originally intended for. Read the manuals with both utilities carefully & check out the AFCAD & Traffic Tools forum here. It looks complicated at first but is not difficult once you understand the basic principle.
PS. It's possible to create your own static aircraft macros with a little utility named M98toBGL posted somewhere in the scenery design or utilities section. This will convert existing aircraft models into API macros. It works best with very simple FS98 aircraft.