I played that game. (Actually, I think I took some textures from it for HD2
)
It is built off of the ArmA 2 engine, and as far as I know the controls are pretty much the same, but I always go to Options > Controls to remap my controls to match HD2 anyway. AFAIK, that is the only way to make it more... fluent.
I do not think there are preset control sets so you will have to remap them manually, but you may proove me wrong.
(hint: for flying, use a joystick
)
But I do know that by default the mouse wheel is the context-menu (
Get in truck (driver) | Gear | Switch to gunner seat | etc. etc.)
What I am playing now (and yes, stealing textures from also... shhh!) is the
Invasion '44
ArmA 2 Mod. It is pretty good and has some Commando missions included, but you will also want to remap the controls.
EDIT: Make sure its not
FADE