I have a Raspberry Pi B+ running RetroPie 2.3 set up alongside OpenELEC using BerryBoot. After RetroPie starts up and enters Emulation Station, it asks me to hold down a button on my controller to begin setting up the controller. When I do so (I am using a Buffalo SNES-style USB Gamepad), it allows me to input all directions on the D-pad, the start and select buttons, the L and R buttons, and the A and B buttons. However, there is no option to program the X and Y buttons. Am I doing something wrong or missing something? Or can I manually program the controller via SSH? Your Help would be greatly appreciated.