I don't know about "Controller Companion", but if you want similar functionality in other programs, you could also try FreePIE. Here's a starter script to get you going, in case you use it:
index = 0 # Joystick index dz = 100 # Deadzone ### CONTROLLER BINDINGS snes_left = joystick[index].x < -dz snes_right = joystick[index].x > dz snes_up = joystick[index].y < -dz snes_down = joystick[index].y > dz snes_a = joystick[index].getDown(1) snes_b = joystick[index].getDown(2) snes_x = joystick[index].getDown(0) snes_y = joystick[index].getDown(3) snes_l = joystick[index].getDown(4) snes_r = joystick[index].getDown(5) snes_start = joystick[index].getDown(9) snes_select = joystick[index].getDown(8) ### KEYBORD BINDINGS keyboard.setKey(Key.LeftArrow, snes_left) keyboard.setKey(Key.RightArrow, snes_right) keyboard.setKey(Key.UpArrow, snes_up) keyboard.setKey(Key.DownArrow, snes_down) keyboard.setKey(Key.X, snes_a) keyboard.setKey(Key.Z, snes_y) keyboard.setKey(Key.LeftShift, snes_b) keyboard.setKey(Key.Escape, snes_select) keyboard.setKey(Key.Return, snes_start)First you'd add or change the existing controller bindings to point to your XBOX controller inputs, and then you'd set the keys as you want in the Keyboard Bindings section.
Another option would be XPadder (pretty easy to use, and there's a free version around), or Pinnacle Game Profiler (though that requires that you buy it).