don't know about guides. Just try to find 3dripperdx tutorials on youtube, and how to use it with 3ds max. It's not fast process to make radar map, but the result worth it
like this one?
To make radar map you need to use 3dripperxDx or NinjaRipper and 3ds max for rendering. Or in simple way just use geodata layer 0 (.BMP from HDGE)
make .bat (.cmd) file with this text:
FOR /D %%i IN (%*) DO call :pocedure %%i
exit
:pocedure
l2encdec.exe -e 121 "%~1"
move /y "*%~nx1" "%~dp1"
exit /b
and place near l2encdec. then drag and drop .utx
you will got encrypted copy of file. just rename and use.