I already have a switch on the dash that enables some sort of anti-lag in that it makes all sorts of popping noises when you rev the engine past 2000rpm that scares the crap out of other motorists & pedestrians and draws a large amount of unnecessary and unwanted attention my way (apart from in the tunnel, then it's fun)
In actual fact it operates the exact opposite of how I would have thought anti-lag should operate in that it should engage when you take your foot off the throttle so as to keep the turbo spinning and on boost and disengage when you hit the throttle again.
But anyway, how it was setup was always operating at idle, plus it had rotational idle enabled presumably to either keep temperatures down by rotationally cutting spark to a different cylinder, or because it sounded good (or both)