Not sure where you've heard that nonsense but their ecu's are pretty basic underscaled hfm types, no LDR control in them. You do hfm re-scale for airflow, fuel, ignition, open/closed loop, idle and knock mods for a decent flash tune like they all pretty much are, then mod dsg to suit.
There is a certain Mk4 R32 file that I have personally seen, that tells otherwise...
It had SY_TURBO at 1.
N75 output is the intake manifold flap on these. It is possible to write your own boost control for other ECU's and use this flap. I have done this for a VR5 engine myself.
It is fairly straightforward to configure it as per the C166 user manual. Works exactly as intended too.