Remapping "Game Keys"?

I’ve already run the firmware that fixes the volume to be Shift+Vol, and the Fn = Trackball up/down for scrolling. But how would I go about changing the gamepad keys? The arrow keys, are, well, arrow keys, but the ABXY keys are ‘Gamepad’ keys.

My issue is trying to key-map controls from emulators. Half of the the upper game keys work for ‘keyboard’ style mappings in emulators, but the others don’t register as a valid input. If i try to map a gamepad, the keys that formerly didn’t work, do (and the ones that mapped as keyboard are now not recognized).

If I could set the ABXY to just being standard keys (like A, B, X, and Y), It would all map as a keyboard input.

How do I go about that?