Im in a similar position with the CNSD upgrade, I got my CNSD files from usenet.
I have my F9220 running v2004 now, but when i insert the SD card with the updated maps on, nothing happens.
For info, i had an SD1 and SD2 folder. I have wiped my SD card, and just copied the contents of the SD1 folder (Firmware, Update and CARDINFO.cif) to the SD card, nothing else is on the card. Should there also be the content from the AVICZ110 on the SD card, or JUST these 2 folders with their contents and the CARDINFO file?