Just wondering, as I've read of folk reprogramming their head units to include full board computer features using a few TECH2 hacks.

Mine's the 040 Opera unit (6xCD), with full BC (twin trips etc) enabled - are there any other hidden tricks these things can do?

Be particularly interested if there's any way to add an Aux input to an '06 head unit, or even swap out the mono screen for colour.