Invulnerability and Unlimited Ammo:
Go to the Main Menu and enter the options screen.
After that, go to gameplay and select settings.
Now look at the bottom of the screen, it will say:
"Cheats= Invulnerability and Unlimited Ammo" with
boxes to check if you want them on.
Fly any plane:
I'm not sure whether these are cheats or just some
programing errors, but I consider them cheats.
This is one of the discoveries I found in Janes F-15:
When you are in the mission builder YOU can fly any
plane in the list.
Make a new mission, edit a campiagn mission, etc. Choose
the human plane (your plane) and choose a plane other than
F-15 (eg. SU-27, Mig-29, etc.)
when you fly the mission campaign or whatever, the cockpit
will look like the F-15's, but press F8 (exterior view) and
see the difference!!!