Thank you for your reply @cpinter. Actually, I don’t know any of coding and since I am in medical filed, this whole thing is really new to me :). I’ll have to find someone who could help me with that.
As I have already made the whole model (stl file), combining two persons DICOM data, and is it possible to run this script on that model? I presume that I have to import it back in Slicer and run it from there?
Regarding specifications for binary file, my collegue imports it in software manually or copy/paste 
(but for whole body it would be too much I think). I have example data that I open in note (it is classical bin data as I’ve been said, as seen in pic). I hope that I could get same thing when import my model in Slicer.
Best regards, Vjekoslav.