Sorry for the double post, but I am not able to modify or update my previous one.
I figured how to change the resolution in the GlobalVar.h
#define LARGE_RES_X 1400
#define LARGE_RES_Y 900
Now the problem is that, when I logon to the Corsair server with the new compiled client, it doesn't show the earlier made characters and thinks you are new to the server.
You can still create a new character (when there is a slot left on server-side), and open the game, but when I logoff and get back online, all characters are gone.
Any idea what piece of code is responsible for this character??