For the time being I drove a Renault Scenic with a built in Tomtom.
Figured out how to check the map version; 725.1882
Fired up my laptop and started my favorite browser to look for a solution.
Found this amazing thread.
Dug into a drawer and found an unused 2GB SD Card which is the same capacity of the original one.
Copied the original SD Card content to my laptop. (always have backups)
Followed this manual and succeeded to create a working SD Card with Tomtom App version 8.843 and map version 1030.9524
Now I have also the IQ and ALG.
Fiddled around with some voices, photo's, cars and raster files.
Thank you so much for this perfect explanation !!
!! Keep up the good work !!