If  you want to use any other plane in the game in a mission, you
can do that by typing in the callsignbox (example): If you want to use
a Mig 21 you type in the callsignbox use:MG21 Then ALL the f-18 planes
in  that  mission  are replaced by Mig 21 planes! This is NOT the same
cheat as the fly:MG21-00 cheat, this is only possible if the plane you
want  to  fly  is  already  somewhere in the mission! The use: command
replaces  ALL f-18 planes by the plane you want to use! So if you want
ALL  f-18  in  the  mission  replaced  by  F-14s then just type in the
callsignbox  use:  F14D  and  ALL f-18 in that mission are replaced by
F-14s!

Plane Cheat:

     To  use  the  following aircraft, on the Pilot Menu where it asks
for a Call Sign type:

MG21  -  Mig21 Fishbed
F16C  -  F-16
F14D  -  F-14