As was said above, it *should* work out of the box. If it doesn't, then it probably means that a custom setup has been applied to the controller. That's not a problem, but it does mean that you will need to use custom inputs in GameEx. Go to the Setup Wizard then use search to find "custom input". Once you are done setting things up the way you want, make sure to enable "use custom inputs". Also note that GameEx is designed to only accept one button assignment for each input. As a result, your 2 player setup will only allow player 1 to control GameEx. You can get around this with a script to remap keys, but it's not necessary. Get it working first, then ask if you want to do that.