[Help] Modding my Xbox

A friend of mine got frustrated while playing Halo II, kicked his Xbox, and killed the hard drive. Like a good friend, I then took advantage of him and bought it for 20$ before he had a chance to cool down and realize that replacing a single part would cost him 10$ on eBay ... rather than replace a hundred dollar system.

So I was sitting there with my new toy and a new hard drive that took Forever to get here, and I realized that this would be the perfect opportunity to build a mod chip for it.

But the more I searched, the more I realized .... Micro$oft has released nothing on the Xbox's architecture. Well, maybe not 'nothing' but nothing beyond what isn't obvious to the kind of people who'd want to open it up when they open it up. Upon a bit more digging, I found a few tidbits/projects/bragging, but no real compendium of knowledge.

Now to the point .... anyone out there have some good links/resources on this system's guts, and furthermore would anyone like to help me create the authoritative compendium?

Jam it back in, in the dark.