A very detailed article from the TwoSixties blog about making the most of the entertainment systems in your MG ZT and Rover 75. I have been tempted to do something similar myself but for the time being sticking to the BMW upgrades to the OEM set up.
Well worth a read at …….
Upgrading the entertainment systems in both the MG ZT and Rover 75
MG ZT info mods and maintenance 