@Kunix
Yuppiii;-) Kunix we have really big progress. After flashing Your RGN I have full access to the Garmin disc. Is visible on my PC again. First I was cleaned the mess on the Garmin disc. Next I tried to upload correct firmware. In this point I get the same message "The Garmin device is unable to program the requested memory region." The procedure:
1. Original update.gcd I drag into input file.
2. Select ORIGINAL and Make Firmware
3. Run Updater.exe
After that the message as above.

Below I attached photos how the navi looks like now.

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[Only registered and activated users can see links. ]

[Only registered and activated users can see links. ]