All right here's a pinout of the power regulator voltages:
first of all here's how the power regulator board looks:
all you really have to worry about are pins 12-22. pin 13 is 3.4v, pins 16-18 are 1.9v, pin 21 is 12v, and pin 22 is 5v. also you have to make sure you have ground.
here's the pins on the GC ( that box with the lines is the heatsink....I suck at paint):
pins 2 and 13 need 3.4v, pins 6,7,16,17,18,19 need 1.9v, pin 10 needs 12v, and pins 11 and 22 need 5v. just make sure that the pins that I've grouped together, like 6, 7, 16, 17, 18, 19 are connected together. they should be, though.
and that's how you only need 5 wires to attach the gc power regulator board to the GC board!!!!!!!!!!!!! that "bit of bad news" was that a gc regulator had fried and so I ordered another one....
* oh yeah if you turn on your GC and you don't get any sound, try getting the 12v not from the pin on the GC power regulator, but directly from the actual GC ac adapter. I also tried that from the 14.8v li-poly battery pack and it worked fine.
This is a bit contradicting. From what I understand, the diagrams would have to be like this:
However, that is contradicting. I'm trying to write an article about the 12V/5V thing on my site (Well, copying SS's article and adding some pictures, to be precise). I decided to take actual pictures, because a picture says more than thousand diagrams (:P).
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(the psone screen)!!!! Also, you can get VGA from the GC if you want 
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) that shows you how to make a low battery LED indicator. You need a zener diode with a voltage rating equal to the voltage your battery drops to a little bit before it dies, a 2.7v LED or similar voltage, a common 2n3904 transistor, and a 1k resistor.
