My nav unit (mk2) died requiring an “on/off” every two minutes to keep audio functioning. I came across a range rover MK3 for cheap on ebay.
Upon installing it into my car, I get the screen:
“Loading of software required.
Please insert a suitable CD-ROM”

I am comfortable burning images to CD-ROMs and such… I just need advice on which image / process to implement?

(I did a forum search and didn't find explicit instructions on this topic...)