Plane created in Gmax?

I have a plane, created in Gmax, what I was wondering is if I can use the aircraft.cfg, sound, texture, and air files from another plane, just to test it out 
Do I need to change a bunch of things in the files, and if so what
I know I can the airfiles, because I have done that before, just renamed it, but not sure if I can do that with the cfgfile, or if I will have to create a whole new one
Thanx in advance ;D

Do I need to change a bunch of things in the files, and if so what

I know I can the airfiles, because I have done that before, just renamed it, but not sure if I can do that with the cfgfile, or if I will have to create a whole new one

Thanx in advance ;D