Google "Motionjoy" and try running that. Once you install it and it's drivers you can mask your controller as an official 360 controller. I use it to mask my PS3 controller as a 360 controller and have been playing Rage with it on my PC with no problems.
But this just doesn't work just tried it and as I've got a PC Compatible gamepad (Looks exactly like xb 360 Controller) it won't find it as a loaded device keeps looking for PS stuff
You should have just purchased a real Xbox controller. Sure they are expensive but the build quality and software drivers are excellent, plus there isn't a single game releases in the last 3 years that does not automatically recognise and configure it.