@Nightstorm, I've successfully incorporated the AIM-260A JATM as well as the AIM-9x Bl.III on the F-16, F-18, A-10, F-86, F-15E, F-2, EF Typhoon, Rafale by copying the CLSID of the AIM-260A + AIM-9X Bl.III such as:
{ CLSID = "{AIM-260A}" ,arg_value = 0.0},
When you copy that to an aircraft LUA module using Notepad ++, notice that the aircraft has several CLSIDs, which dictates which weapons that aircraft would store. (e.g.: F-16C.lua). I placed the CLSID of the JATM on the aircraft lua file (if you can't find it, either head to the aircraft folder, then either search for Entry/Weapons/Scripts or if possible the aircraft LUA module will simply appear alongside entry.lua. Then when I loaded DCS I could not just only successfully incorporate it, but also the missile worked when the AI F-16 launched the JATM.
That's what it takes to incorporate a new weapon to other planes. Remember you need a lot of good coding skills for this, especially LUA. Better TAKE 100% risks for this.