What ever one you have, you need to fit all the parts "loose" first, otherwise you will most likely find its difficult to get it all lined up.
I suspect you have the same guard my friend has, and the same as Rob above has fitted to. Its easy enough to do, but just take your time.
You "may" find the factory protection bar gets in the way, if it does just remove it as the steering guard is doing a better job anyway.
Its "easiest" to remove the bumper and do it, but you dont have to.