Hello!

Now i have done follow steps :
1. Clear all user data and Nonvol Statistics
2. Flash CURE
3. Format partition like in tutorial back in to FAT32
4. Flash nuvi37xx_GCDFile__500
5. Start device
6. Connect to WebUpdater and install all updates.
7. Start GarminMapUpdater and install Map with my MapId, it will be accepted and installed.

Do you add CN or some other map on your nuvi?
I have started GarminMapUpdater and after 1 hour i got map on 3790 see screenshot NR 1.
Do you add gmapbmap.img ( base map ) in .system folder
No, how can i do it ?

In settings you can change text language to your language.
When i do all this steps, i don't have text and voice on device, i copy it from my 3590, but i have steel some text in eng.