This is even better than promised. I got the three RAR files from the IMG UNLOCKED links in the first post, which produced a GMAPSUPP.IMG file, 1,308,393,472 bytes. I installed this into my nuvi 650 and was astonished that it not only worked flawlessly for the US, but also for MEXICO, or at least the parts I could check from personal knowledge! The gps reads this a CNNAmerica2010.40, as expected