I'm in a similar situation. I am trying to make a backup copy of my Navteq 05064033AD disc for my RB1. I've used ImgBurn in both my failed burning attempts. The first time I burnt a normal DVD+R DL, the second I changed book type to DVD-ROM. Both discs are rejected by the RB1. I've searched high and low online and haven't found anybody whose been able to sucessfully burn RB1 media. I've found a few that can burn Navteq media for other Nav systems but nothing for the RB1. I wouldn't think DVD labels would make a difference but after reading forums the AB through AE label names are considerably different.