Freehub body replacement help

[SnowTown]

I got an Easton EA50 SL wheel set that came with a campagnolo freehub body installed. It also includes a shimano freehub body uninstalled. I need to replace the campagnolo freehub body with the shimano one but I'm not quite sure where to start even after watching the cassette, freehub body replacement, and bearing overhaul video. What I have right now doesn't really look like anything in the video. Anyone know what I need to do/start?

Picture the two freehub bodies:
[attachment=49]

[Alex Ramon]

Park Tool has some specific directions for this type here:<br />
http://www.parktool.com/repair/readhowto.asp?id=45<br />
(Scroll down a bit)
Hope that helps, let us know how it goes.