AE: The only button I could readily map was the camera button, and that's fine for me to give up. I assigned the task manager to that, so I can access it from anywhere... i need that task manager :P
As for the other buttons, AE sucks for smartphone. For instance, if you handle the left soft key, it doesn't give you the option to send a 'left soft key press' on single tap so you can't continue to use it normally
i kinda gave up but keep trying different keys out.