Not sure if this is a TuT or not, but as some of you know, Nexon has been trying to patch your REZ files everytime you go in game, so to stop your REZ files from patching, DO NOT run Combat Arms from the website.
I REPEAT DO NOT RUN FROM THE WEBSITE! INSTEAD USE COMBATARMS_DIRECT.EXE FROM C:\Nexon\Combat Arms
Easy as that, not sure if this is the right section, if its not then moved this, but I made it here so people can see it since no ever goes in Discussion.