Indeed you do. I found it easier to do with 2 people - you use the special shaped tool to hold the clip and rivet in place on the front side of the wheel (with the rear of the wheel facing upwards), and then you carefully smash the living daylight savings out of the rear of the rivet to secure it all in place.
I put the tool in a vice, rested the wheel in place on top of this with the rivet picking through and used one person to hold the wheel nice and steady whilst I clouted the rivet with the ball end of a lump hammer. Not sure if you can picture that?!