The PC I've been using to run Mach3 has been slowly going downhill. I think it's the power supply, but every time I start it, it takes about 4 or 5 restarts for everything to come up. I'll see the light in the optical mouse turn on, then go off. Once it starts and gets to Windows with everything working, it stays solid as a rock, but it doesn't inspire confidence. I think I'm going to swap it for another copy of the same system (from '04). Just take the other computer, which seems to be solid, and swap hard drives with the one that has Mach3 on it.
I have to say that Hoss' DVD seems to have all the information, but it's not organized well. He includes things like a drawbar wrench, which made me wonder what it was for. The Phase 2 section has all the belt drive components for the Z axis, but doesn't say you can't use the direct drive method. I found that somewhere else (I think!). Some more work on a big picture of what you're doing, more like workflow and not step-by-step directions, but more overview of what you need and how you get there, in one place, would make it more helpful. I'm not even sure there's a single place to go read what the difference is between the phases 2 and 3. The other side of that disorganization is that if you email Hoss, you'll generally have an answer in a few hours.