This is only for the wired controller, I believe an adapter is needed for the wireless but I'm not certain.
Assuming you haven't already done so download the software for using the 360 controller on the pc from here (just select it in drop down boxes)
http://www.microsoft.com/hardware/download...p;sku=JR9-00001once installed you should be able to connect the controller and the pc should recognise it.
start rFactor and then following.... customize.....settings......controls......mapping
you can then assign each button/axis to whatever you choose
That should be all you need to do