Under Armour Multi Pack

To install place the files in required, and the camo you want in C:\Program Files (x86)\Steam\SteamApps\common\Counter-Strike Source\cstrike\custom\My_custom_stuff. Then move and replace anything if asked. And For Garry's Mod put the files in required, and the camo you want in C:\Program Files (x86)\Steam\SteamApps\common\GarrysMod\garrysmod