Hey,
Thanks for the answer.
I have a gtx980TI and trying to have a 1920x1080 resolution.
Actually my problem of the game not displaying is fine now, just had to launch it as admin after entering the :SET gxWIndow "1" maccro in the config.wtf.
The next problem is that i can't choose the 1920x1080 resolution in the option, only 1600x1200. I tryied to change some setting in the nvidia graphics options such as the scales one. It worked first but when i disconected (not even quit the game just got back to the character selection) it came back with the wrong resolution.
i've tryied your maccro, it didn't work :(