Какой именно мод? Релоадед или Риот ?

http://world-css.ru/source/459-zombiemod-300-rus.html

Устанавливаем Zombie MoD:
Раскладываем все по папкам:

cstrike/addons/zombiemod/bin/zombie_mm.dll


cstrike/addons/zombiemod/bin/zombie_mm_i486.so


cstrike/cfg/zombiemod/models.cfg


cstrike/cfg/zombiemod/downloads.cfg


cstrike/models/player/zombiemod/*Six Models 36 Files*


cstrike/materials/models/player/zombiemod/*Three Materials*


cstrike/materials/skybox/*Six materials*


cstrike/sound/ambient/zombiemod/zombie_ambient.mp3

;If your plugin came with a .vdf file, you do not need to use this file.
;
;List one plugin per line. Each line should contain the path to the plugin's binary.
;Any line starting with a ';' character is a comment line, and is ignored.
;
;You do not need to include the _i486.so or .dll part of the file name. Example:
; addons/sourcemod/bin/sourcemod_mm
;You may also put an alias in front of the file, for example:
; sm addons/sourcemod/bin/sourcemod_mm
;Will allow you to use "meta load sm" from the console.
;
;********* LIST PLUGINS BELOW ***********
;addons/zombiemod/bin/zombie_mm