Seems like the pinout you posted matches with the one i found.
But the question is, is it OK to bridge some pins on the plug? E.g. in my diagram the ATX plug (right side) i wired one 5V line (red) to pin 3 and 13. Is there any difference in the power lines (now speaking of all 5v lines) coming from the powersupply? Or can i use every line on every corresponding pin in the new plug?
And what about the orange 3V line? On the old plug (left side in my diagram) there were two cables coming from the powersupply to the pin 5 of the old plug. I just connected these both cables and soldered them with a Y-cable to pin 7 and 18 at the new plug.
I hope now my question got a bit clearer. I think it's hard to explain what i mean