Like Mrmiata is saying, some things are plug an play, some are not. "Security box?" Did you replace the one in the trunk (clp/) or the one behind the speed-o (skreem) and / or the ecu? I think some of MY confusion , is coming from the "terminology" that is being used. It would help ME, if you would tell us exactly "what" was put in (replaced) from the donor car. That way we can say, "will work/won't work" an get this baby back on the road.