http://www.outofspec.com/frankenmac/wire.shtml

Looking at the link you provided earlier, the two additional pins toward the top of the connector require at least 12v to start up- or so i've been told. If I could seriously connect it to just the 5v standby line and have it work, then this would be much easier. Like to hear more about your theory though, very interesting.

I don't intend for this power supply to be the final, I have a much better PSU lined up for the task. Tonight was the test run, the check to see if was actually possible to boot it up and I have to say, it's been a real success. Once I pick up the PSU extension cable, that's when the real fun will begin.

So it's now booted into Mac OS X Tiger... sort of. It's fairly unstable. The RAM I have in it at the moment isn't the most reliable stick i've ever seen, and the installation on the hard disk is quite old. Should be fine once the machine is cleaned up.

As promised, here are a few rough pics snapped with my iPhone during the process.

Soldered CPU Supply Wires

The Completed External Power Connector

My Cheap Soldering Station, Wiring up a fan

The Tower Open

Quicksilver Kicks into Life

Mac OS X Starting Up

I'll keep working on this further as more parts become available.