I did it as instructed on the link you have there and it worked like a charm. Found a car tuning guy who burned it onto an EPROM (apparently many european car makers use 27C512 eproms in ECU). Patched it from 1.12 and tried out in Vpinmame just to be sure that I didn't botch it. I never done it before, so be sure it's not a complicated procedure.