I believe he is after the wminput config file (as am I for my customization script I'm writing), unless you are using the default gamepad configuration?
# gameport Plugin.led.Led1 = 1 Classic.Dpad.X = ABS_X Classic.Dpad.Y = ABS_Y Classic.LStick.X = ABS_HAT0X Classic.LStick.Y = ABS_HAT0Y Classic.RStick.X = ABS_HAT1X Classic.RStick.Y = ABS_HAT1Y Classic.A = BTN_A Classic.B = BTN_B Classic.X = BTN_X Classic.Y = BTN_Y Classic.Minus = BTN_SELECT Classic.Plus = BTN_START Classic.Home = BTN_MODE Classic.L = BTN_TL Classic.R = BTN_TR Classic.ZL = BTN_TL2 Classic.ZR = BTN_TR2