[Alan Anderson]

The easiest way to find out what the joystick does is simply to try it. We have done that using a PS2 controller (with USB converter) and a Rock Band wireless guitar.

Going from memory, as I do not have one in front of me to check:

Joystick axis 1 is X (side-to-side), 2 is Y (front-to-back), 3 is throttle. Axes 4, 5, and 6 are not present.
The buttons are numbered 1-11 (with the trigger being button #1). Button 12 is not present.

What more do you need to know?