Thread: City Navigator North America NT 2011.10 3D (20.11) - Win+Mac

Originally Posted by Xtracrispy69

Been reading a lot on these posts and people are doing a lot of different things. Maybe someone can point me in the best direction. Have a nuvi 250. Have the latest software but 2008 maps. I saw three styles of downloads on page 1 of this post: standalone unlock with multiple files, the full 4 gig (which I'm guessing has mapsource in it?), and the unlocked img on its own. Why are people doing different things? I downloaded the img, put it on an sd card, ran the nuvi, selected the map and nothing changed. I did notice on the main memory the main file is a prom.img and the card runs supp.img. If I want to update this properly what method should I do? Any help would be great.

Rename your original file gmapprom.img to gmapprom.img.old so your device will not "see" it anymore an it will read map from SD card.
Later if you want to restore original file you could just remove .old extension

have u unlocked it with zumo id?

use this to unlock an img
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Originally Posted by Hardati

Thank you so much Catymag. It's now working like a charm when i used the fast img unlocker. By the way, to answer your question, I unlocked it on mapsource using the 16 digit code provided with the attachement I downloaded; there was no need to enter the zumo id.

If you are using attached code map is unlocked only in MapSource, but if you generate another unlock code with JetMouse using ID from Your GPS, it will be unlocked when you transfer it to device.

Originally Posted by FoxhoundEP3

how would you install this on a KNA-G510 unit from Kenwood/Garmin?

copy unlocked img in an sd in a garmin directory, rename it gmapsupp.img
Before updating to the new maps, you should first update your receiver software

Code:

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