Appreciate that, Nicolas, but I was referring to the language change process using a Resler cable and Navcoder. You said then that " ... it will ask for the firmware CD for the satnav language change, and you can't use BMW ones on a Rover unit, you need the specific Rover CD.".
I infer from that, that the CD asked for is not the same as the BMW V.32 (copied) CD I used simply to update my (English language) Mk.IV firmware level for running 2019 maps DVDs therefore?
David