I think you have to do the fuel pump as well.

I'm doing it on my WRX 97 as we speak. (3 yellow plug ECU)

ECU plug b136 pin 8 and 10 are swaped (Cam/crank) (white/no stripe and red/no stripe wires)

ECU plug b137. Pin 17 moves to pin 7 (Light green/black stripe) fuel pump line.

It describes it all page 58-59 of wrx serverce manual 97-98 PDF.

As far as i know that should be correct... That will allow a JDM ecu to work in an AU/EU wired car.

Tim.