OK - what I did:
From FW6.40 I extracted boot.bin and saved it on desktop.
With HEX editor I found bytes 0C 80 A0 E1 and change to bytes 0C 80 A0 E3. I have changed just E1 to E3 as the other part of string not changing.
Is that correct? Sorry for stupid questions, but never work with HEX Editor and have no idea what is right and what is wrong.
Saved new file as **modified.bin.
The point 2. of [Only registered and activated users can see links. ] - I can manage with that, but it concerns SD card, which I can not use. So I skipped it for the time being.
So I went to point 3: make RGN from the boot.bin and here I stacked.
I know just RGN Tool as program for transformation of GCD to RGN files or vice versa. As far as my file is **modified.bin the program did not accept the file.
When you have time - give me some directions.
It is easy to have ready made by you file, but my main idea is to learn and not to ask for help again next time.