To add to this:

I have been studying the schematic of the original Sony power supply. I might be able to figure out how to make it standby-start.

So just a couple modifications of the power supply, and a standby control IC. (flip-flop or whatever, for me I am going to use a MCU), and then tap off of the VIA2 and ADB power button signals.

There is a small switching circuit inside the power supply that kick starts the SMPS, then the SMPS takes over, using the 12v sweep supply to power the main switching IC.

So, I can break the junction point at D268, and D263. So, when i open the relay, this well effectively shut down the entire power supply. But, it will still leave the IC151 micro-SMPS circuit running. Ill use this circuit to power the standby controller, and the relay.

Once the relay clicks on, voltage from the micro-SMPS will pass back over through D263, fire up the SMPS, and D268 will begin to feed 12v and take over powering the circuit, and relay. thus virtually no added load on the micro-SMPS except at switch-on.

Again, Black art on a power supply. NO PROBLEM

Aztec supply is different, so i would have to take a different approach. Probably the standby VCC to the PWM control IC.