x360ce is a library that translates XInput calls into DirectInput calls. Most modern PC games are designed to work exclusively with Xbox controllers (XInput). If you own a generic USB gamepad, a PlayStation controller, or a racing wheel that uses DirectInput, these games often won't recognize your device.
Yes, if you download it from the correct source.
That way you can instantly restore the setup if you reinstall Windows or the game.
: It provides a graphical interface to map buttons, sticks, and triggers from a generic gamepad to the standard Xbox 360 layout. Auto-Mapping