N910F: How to create odin flashable 5.1.1 file (works on every 910F!!), no PIT needed

as some of you may have noticed, since note4 you'll get a "wrong size error" when flashing a new firmware with odin when you want to flash a different region firmware.

example: your CSC is DBT (you have a german note4) and want to flash the new 5.1.1 file with region HTS.
if you download the file and flash it, you will get an error in odin which tells you that the size of the hidden.img is too big.

solution (i did this a few minutes ago, and it works perfectly):
download the HTS file and remove the MD5 at the end of the file. then extract it. you will get a bunch of files. delete the hidden.img and cache.img.

then, download and install CYGWIN (linux shell for pc): https://cygwin.com/install.html

then open cygwin and move to the directory where the files are located, for example: cd /cygdrive/c/*foldername*
then re-tar the files with the command: tar -H ustar -c aboot.mbn sbl1.mbn sdi.mbn tz.mbn rpm.mbn boot.img modem.bin NON-HLOS.bin recovery.img system.img.ext4 > 910f.tar

then you can flash the 910f.tar with odin without any error, and bingo: you are now on 5.1.1 with your old CSC preserved! :)

this can be used every time when you want to flash a rom not meant for your region, which gives the said error message in odin!