with the RGN_tool opened, I dragged nuvi16xxEU_regionfileonly__390.gcd into the File drop zone, after unchecked the boot.bin box, I tried to save the file as 113201000390.rgn but I was warned "Section 1 must be enabled. Normally it should contain section '0800' boot.bin" and I am afraid I am not able to save the file at all.

Is this the way to create a modded boot.bin RGN file? If I am able to create this file I believe I can perform method #4

Tried the QuickCure, without any luck.

Out of my curousity. What would be the solution for the device to boot if i had the device in MSM?
In your post #16 ...There's no need to load a cure fw if you have MSM, but there is every reason to load it if you haven't got MSM.
Should i have loaded the "original" instead of "cure" and flash it with updater.exe?

the version of QuickCure with flasher from P#36 "Running programs from SD on nuvi involves creating boot.bin from gcd and patch (did he mean changing the RGN Region? Mine are all grey out)