I got a little further. I hacked up an old ATX power supply and tried using the 5v line from one of the molex connectors. I can get the left arm to move (shoulderX, shoulderY, elbow, wrist), but none of the others respond. I think I will try the 5v line from the motherboard connector. I think I read the molex connector has 5 amps, but the motherboard connector has much more available.
P.S. The servos and mounting hardware are very light weight, the whole thing weighs less than 1 pound. For now I am only working with the upper body (arms and chest).