ADVANCED INSTAL  (vpk-all modes)

go to steamapps/common/left 4 dead /left4dead/addons and put vpk in.

go to steamapps\common\left 4 dead \left4dead\...find pak01_dir and make back up....then edit pak01_dir with notepad++. 

    *here is EXAMPLE of a re-edit  ------ctrl+f for find menu

-----find:  


$baseTexture "models\v_models\Weapons\pistol/V_Pistol_Reference"
$bumpmap "effects/flat_normal"

     and change to:

$baseTexture "models\v_models\Weapons\pistol/V_Pistol_Referenca"
$bumpmap "effects/guns_normal"


-----and also find:
  

$baseTexture "models\w_models\Pistol/W_Pistol_Reference"
$bumpmap "effects/flat_normal"

     and change to:

$baseTexture "models\w_models\Pistol/W_Pistol_Referenca"
$bumpmap "effects/guns_normal"  


done.