So I went through the 2 campaign txt files in a new campaign folder (just copied and re-numbered the Red Hammer one). Changed the 100's, Hunters, 84, F-4C, and G91 squadrons to F-5Es. Then added 10 more F-5E squadrons. Clearly I am not doing this right... No new squadrons show up on the map, none of the previous squadrons mentioned are flying the F-5E, and none of the F-5E squadrons with pilot and aircraft max's set to 24 are at 24 (they are still at 16 in game).
I also updated the F-5E's user list. I followed this to edit the campaign: http://combatace.com/topic/44798-adding-aircraft-to-campaigns-in-sf2/
Any ideas? ***EDIT***
Really stupid simple...forgot to make sure the DataFile called for in the campaign ini was the right one. It was still pointing to the other Red Hammer campaign! Applogies, I'm learning.