Quote Originally Posted by Beddhist View Post
@ lolypop000: I have tried both *1.img files and they don't work for me.
Quote Originally Posted by lolypop000 View Post
Zumo 660 recognize:

gmapsupp.img
gmapsup1.img
gmapprom.img
gmapprom1.img
Beddhist - gmapprom1.img is not for you only. It is from software source and must work on all version in Nuvi together with gmapsupp.img and gmapprom.img!

On SD only gmapsupp.img and gmapsup1.img will work from 4.70 version.

If it is not so you do something wrong. Or may be conflict with map and you need to try rename the extension (img to bak for example) of map one by one for finding this error. I often did it successful on new SW with support 2 map on SD. Good luck!