I'm not english, so i'm sorry if there is some fault :(
You will need gmod plus downloadable here: http://www.fpsbanana.com/skins/10610
and the door mod, downloadable here: http://www.fpsbanana.com/skins/7236
there is a rocket (it suck), for use it, just press 0
there is some button (the button are keypad) in the map, push it !
for use the helicopters, you need to press E when you are in front of the cockpit (you need to crouch at a moment, and press E after)
for controle the airplane (it dont look like nice, but it work good-.-):
2: for go up
8: for go down
5: for advance
4: for go left
6: for go right
this is my first "good" build, so try it and send a little comment please :)
Yeah uhh, gmod plus is an addon to gmod 10...if i'm right. This is a saved game...so you go to your GMOD 9 directory and paste this in the savedgames folder, then when you start gmod you load this as a saved game. there should be tutorials on installing door mod, & there should be an installation readme when you dl'ed door mod.