Step one: take off your bars
Step two: Unscrew your locknuts
Step three: take out your pro forks
Step four: hammer off the bearing race on your stock fork and hammer it on your inward fork
Step five: put the lower bearings on your fork and slide it into the headset
Step six: put on the locknut's (may take a bit of trial and error to get the spin right)
Step seven: put your bars back on and your wheel on the fork.
Your done and ready to ride.