Why you want to know mike?
.I thought it was probably for a fwend.Point him/her towards R32OC forum perhaps? Likely to be more R32 related info there. Mk4? Mk5? .:R
I never felt the need for a Haldex controller on mine either and would probably only recommend it if you're going on track.
Don't wast money on maps or cams or cats on the r32 it's not worth it for the gains a mate had everything done and made about 30bhp ish even had cams done too I walked up with the ed30 when new and said a map and I get around 300bhp he was a bit p1ssed off