How do they "code" the SD CID (which we know is a SerialNumber inside the SD hardware registry) inside map files? There's no method to use old SD and its CID with new maps? (assuming the files are found, since they are nowhere to be found!!!). How is the CID "paired" with maps?You can't use the SD card with the old maps and simply copy the new maps to that card. You really need to buy an SD card with changeable CID or buy one pre programmed with the required CID.
Or...you can just do like I and many others do. Just buy the SD card with the most recent maps on eBay for 30 euros or so.