hello, I have a iMac g4 model M6498 15 inch. I stripped it down, got the monitor wires all set. But I have two questions, one the wires for the monitor are different colors than the videos ive seen, and two, for the power supply what kind of ATX PSU should I use. On a video the guy said use an 'old Atx PSU.' But what model? what voltage etc. thanks to all!