You cannot put new skin to Weapen like , AWM , ak47, aug, Combat Axe etc. becase it gives you error when you enter the game. I checked this allready, you can change the textures of the players, player faces/ hands /shoes, granades, smokes, zombies, bosses, even you can change the sound of weapons. But the textures of the weapon give Error in the first spawn when u enter the game.
Hmm if game give error and dont allow to play with textured weapons, why HGWc does allow to open the crossfire and log in ?
In Crossfire Sea you can make any changes what which you want

You can edit rez. And it doesnt give error at all.