You can pretty much think of this as another Expanded Psionics Handbook or Magic of Incarnum, and approach it the same way (basic rules -> base classes -> rituals). The Ritualist would probably be the best one to start with, since it was the class the original rules were written for. I think it should be fairly easy to follow, but if you ever get stuck, nudge me, I'll be happy to explain material.

And it's more or less possible to blame SirPercival for this appearing whole cloth - he and I have worked together for a while over on MMX, and he finally convinced me to start posting my content here as well. So I've got a few more of these systems ready to go when I get around to cross posting.