Step#1: Open the .rar/.zip file Step#2: Extract ALL!!! contents from Menu_client.zip into your BF2 Menu_client.zip file Step#3: Extract ALL!!! contents from Objects_server.zip into your BF2 Objects_server.zip file
*DO NOT, I REPEAT, DO NOT forget to extract the "Effects" and "Ammo" folder as well otherwise it'll crash or the weapon will not fire any bullets!!! <~ You have been warned
*** You can Edit your Soldier's Kits by going here: Object_Server.zip\Kits\... from here, choose from any of the Factions that you want to put this addon in, i.e. ch\CH_Assault.con... etc.