From what I could tell, Arma 2 Operation Arrowhead is a standalone update of the Arma 2, and because of this some of the keyboard buttons have changed. For this reason, I created a separate Arma 2 Operation Arrowhead Logitech G13 profile for the game. I havent gotten a chance to play the DayZ mod yet, which means I may need a different profile for that game, but I am hoping not.
The profile is similar to the Arma 2 profile, where I use the M1 for running around and in motorized vehicles, and the M2 is for helicopters and jets. The biggest difference seems to be in the way Arma 2 Operation Arrowhead handles prone and crouching compared to Arma 2. It looks like there is one stand button whereas, in Arma 2, there was a stand from prone and a stand from crouched. Below are the M1 and M2 keyboard layouts for the profile.