thank's to all that have commented so far, I live in new zealand and haven't heard of emarald hence why i said motec or autronic because if my memory serves me right they are both made in austrailia or is it just autronic?
and have read up that the sm4 ecu allows anti lag + launch control functions, emarald may also provide this but i go back to my point of i haven't herad of them until now)

cheers again
hadyn