Not really sure what im doing poking around in an ausy thread, but heres an answer you can try:
pushing the VDC button turns it off but not the abs braking when you try to drift thing. I havent tried this myself, but I do know if you press VDC and hold it in for a few seconds, the light goes off completely and wont turn back on unless you restart the car. From what ive read, this is supposed to be the '100% off' button. Try that...
