DIVINA - Help to open .nif files (NifScope / Gamebryo)

Hello everyone !

I have a request about one of my favourite games.
After long searches, someone and me have found a way to decompress .ni_ files of DIVINA Online in order to have a .nif file, then I discovered that these .nif files came from Gamebryo engine (I saw it with Hexa editor).

I didn't knew that Gamebryo is a known engine, then I found a code (looks similar to the code that I saw with IDA Pro in Divina's .dll libraries #pleonasm) : https://searchcode.com/codesearch/view/49690061/
Now that's sure Divina uses Gamebryo engine.

But, when I try to open a Divina .nif file with NifScope, I have "failed to load file header" error. I didn't understand how, I tried to edit the hexa, but still not work.

Please, I need your help, I want to open these .nif files ! I feel we're near of the goal, I really want to open files of this game !

If you need any other information, please tell me.

Link of one of .nif file : https://mega.nz/#!4VEGHKTD!eKg1HlLtQ...0mH3uXmhvjUb3g
(optionnal) Link of libraries with client exe : https://mega.nz/#!YB9WQSzB!T0AmVIPe7...MVzWbapDWFx--E