We finally understood each other. I try to be brief and clear, but I become incomprehensible. My bad English only makes things worse.
My nuvi 2559 has the latest 8.80 software version, but it doesn't work properly. I would like to reinstall the software. I have tried gpupdate.gcd several time before and failed. I need help reinstalling with a SD card.
I know how to open the firmware using the RGN_Tool.exe program, but I don't know what to do next. Also, I don't know which text commands I should enter. My only experience with Ldr.bin is backing up Region 41/154.



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