Very interesting....I will conduct some testing as soon as possibile.

Couple of questions more:

1)to activate startup of all psus I was thinking of purchasing a small relay switch 12v-activated to close the connection between the green wires and ground. The switches on the back of the atx will be open thus the entire setup will be activated at startup by sensing the 12v outputed by a fan or molex connection in my pc case.

2) I still don't get the detail about common yellow wires. In another PSU I noticed that all 12v lines spawn from the same area (a small portion of the pcb marked by a black line). Does this mean the 12v lines are common and therefore can be used?