I am on a high speed wireless connection and cannot pinpoint why the server that file is stored on in Calif. was spitting it out so slowly. I have a file that we downloaded from a friends on a disk named XFIRE_USA_0015.1 disk image file 622.343KB . The Nav unit doesn't see the disk. I did reset the Nav. unit It went from wait to GPS ok and the Almanacs went from zero to 30 in about five minutes, the no of satellites displayed was 4. I saw the screen that said nav. unit initializing and never observed any errors. I observed the screen asking to insert the CD which I did and the screen never gave any further prompts leading me to believe that the file was either corrupted or burned incorrectly.