The Tiny Tuner
if you download the newest updates(tiny tuner update and database update) not the "public release" and have a .bin under dignostics it has the cat dianostics in there guess just put the peramaters WAY outside of anything your car would see and it would never do the test... just thinking logicly... hope that helps out some! sorry guys i got to get to bedi have to be at work at 4am HUGE THANKS on this entire fiddling