Received my cable from DubAddiction today. Pretty good delivery times of 24hrs after ordering - Thanks Tim!

Thought it wouldn't work with using an Intel Mac on Vista via Bootcamp (as per Ross Tech's requirements) but 'voila' it works

Managed to enable my Dynaudio sound setup in my new RNS after it got nicked at the smash repairer (see Passat forum for my story).
Next to reset all the fault codes in the system (40% of the whole controller with malfunction) after reading through the codes before hand..probably the electrician didn't know how to reset the faults.