XDAII with bootloader 1.06 dowgraded !!
First of all, thanks to dcs for the post. I've just to downgrade a XDAII with bootloader 1.06, and I want to explain how it is.
First of all the XDA is featured with a ROM 1.72 ESN and with a bootloader 1.06 as well. My aim was to upgrade it to a 1.59 ESN, nevertheless I think wich version applies doesn't make any difference.
It's enough with making a backup of the current version (ms_.nbf, NK.nbf and Radio_.nbf). By using the commands provided by dcs it's easy to get the .nba files.
The procedure has to be repeated with all files you like to load (that ones from the new version), and ALL headers from the old files to the new files shall be copied (Carrier, Language, Version, model, etc.). Into the ms_.nba file it has to be copied twice.
Then after the files CRC shall be updated, as indicated by dcs, and the new files are encrypted once again, with the .nbf file, and finally the upgrade shall be executed.
Consequently I have succeded in restoring a "dead" XDA.