The World of Avlis

So... I'm interested in working with some of the avlis/copap psionics haks; specifically, I want to tinker with the (technical) PrC itself, some of the feats, and maybe try my hand at a few custom items, just to get my feet wet. The problem, though, is that I don't have any clue where to start.

I've downloaded MrNathan's latest Psionics .hak/module, and I've extracted a few of the files from avlis_main. Is there some kind of basic tutorial, website, or whatever that could get me going in the right direction?

I'd appreciate any help. Thanks!

Since this post was back in March you may have figured this out by now, but do a search on spellhooking. There was a decent amount on the NWN boards about it. That'd probably get you started. Alternately, just look at a psionic power and start changing stuff like the VFX or something simple.