Thanks for your reply
im not sure what firmware it is supposed to be as i cant read the device. i have another 205 which is firmware 7.60 which i have just downloaded and updated, but it still does the same thing. i set the input file to the nuvi2x5W_GCDFile__760.gcd, then i tick cure, then make firmware, and it completed okay. the i connect the gps and update, is this steps correct?