Please HELP!!!

I want to download this file for CA how do i make it work>???
http://www.mpgh.net/forum/210-combat...perknives.html
i download it and put the file of the tomahawk in my CA game folder where all the mods go or not i dont know please tell me please!!!

REZinject..

Us REZinject and injext it into GUNS_M_PV_MELEE. you might need to remane cuz i havent downloaded yet.