tu dois éditer certain fichier selon les skins
Place the whitelist.cfg in the left4dead folder where the vpk can be found.
edit the vpk file.
find the line with the pumpshotgun
$baseTexture
"models\v_models\Weapons\Shotgun/V_Pump_Shotgun_Re
ference"
and replace Reference with Reference2
un rapide copier coller d'une skin