I got the CNDV-100MT map update to work for my AVIC-80DVD by adding the missing files from a CNDV-80MT disc to the ISO before burning. It usually works, but I keep getting a "Please Insert Appropriate Disc" message every 4 or so car starts. Then I have to eject and re-insert the disk to get it working.

Does anyone know how to get around this problem? (Obviously, a genuine CNDV-100MT map disk will not work since it doesn't officially support my Nav unit)