Thank you for your quick response. I've not used the GPS, except for playing around with it. I won it in a game of chance, so I'm not experienced in its functions. Is there anything in the .img file that the device needs to function other than the maps? Is there any way to separate the file into individual map files? If I were to delete the .img file on the disk, would I then be able to install maps from this website? Thanks in advance for any info you can provide.