Yeah I tried both in 1 and 21 as per the PossumLink diagram. In 1 the pump ran continuosly, and on 21 it didnt run at all and threw the code. But that wasnt the problem, the problem was no spark. I was also under the impression the immobiliser is in the key transponder reciever and the immobiliser ecm, which is seperate to the ECU. It also appears that in cars with immobilsers the crank and cam sensors are switched around for whatever reason. I traced the wires with the possum link diagrams to confirm that my car didnt have an immobiliser installed.
PS, I had already bypassed the fuel pump controller successfully. Also something to note for ya Gazzy. The diagram you have for the fuel pump relay was wrong for my particular car. There are 2 relays, one above the other. Both have a black earth. In the diagram the bottom one is the fuel pump relay, but in my car it was the top relay. Either way, of the two, its the one with the green plug on the back.
PPS, The ECU I bought was a version 6 STi jobby. Along with the STi engine and other bits, this car goes well wicked now