Isn't the 6EXA and airplane radio, or does it have heli programming as well?

Anyway, read the manual it came with from Futaba, read the T-Rex manual and read over the radio setups from Raptortechnique.com. That should get you what you really need which is to fully understand the setup since no 2 helis will have the exact same setup and you'll need to tweak yours at the very least. I don't know of a T-Rex site for radio setup.