Plane squadrons can be set up in several ways depending on what you are looking for.
You can active the plane's bundle complex and addtemplate aircraft spawners from the carriers which would make them fly in formations.
You can addtemplate the geometry files which adds the "appearance" of additional aircraft flying in formation where the 'main' aircraft controls all the flying of all attached aircraft and you can add firearms positions to those planes so that the main pilot controls all the weapons ( probably not server sided though ).
Or you can make a mod that has the aircraft spawning in formations and add effects to make them look nice.
Let me know exactly which aircraft you want included and if you also want main pilot control weapon firing or additional PCO ( other players ) able to switch between planes and fire or fly off individually.
To see more screenshots of my mod, click the links below.
http://voltaroxzx7.10.forumer.com/viewtopic.php?t=82
http://voltaroxzx7.10.forumer.com/viewtopic.php?p=260
http://voltaroxzx7.10.forumer.com/viewtopic.php?p=262