hi catymag, I'm glad you answered
I did what is in tutorial, launched garmincure3, generated cure firmware file successfully installed. Then formatted with FAT32 RMPrepUSB, installed and launched the original firmeware nuvi, all right so far, then installed maps with mapsource and tried unsuccessfully to navigate. There is NO voice guidance, although it has when doing simulation route, NO recalculate a new route when I turn the wrong direction. Voices are properly installed and selected. please help