I've set up mine as follows although I'm doing this from memory at work so apologies for any mistakes :)
Left and Right Triggers: Foot Pedals.
Left and Right Bumpers: Collective.
A Button: Toggle Free Look.
B Button: Change Weapons / Show GPS Overlay
X Button: Next Target.
Y Button: Fire Weapon.
Left Analogue Stick: Cyclic.
Click in Left Analogue Stick: Free Look Interaction button (lets you flick switches in cockpit without needing to use a mouse).
Right Analogue Stick: Look around cockpit (this will either snap left / right or free look depending on what the setting the A button is toggled to).
Click in Right Analogue Stick: Zoom / Optics (this is the 'toggle' zoom rather than the hold-down button zoom if that helps).
D-Pad: Up / Down changes selection on the quick menu (Auto hover, manual fire etc).
Right confirms selection.
Left cancels the menu popup.
Select button: Toggle first / third person camera.
Start button: Release countermeasures.
I think that's pretty much everything covered, remember to go though all the controls and remove and conflicting controls for Infantry etc that are in red.
