Have never played this mod myself but usally mods are in a folder called "SourceMods" since i have a legal version i have no idea of how you could do it, but doesn't the mod consist of .bsp files? If so put them in the maps folder. Going to try it out to see if i can help you but you'll have to wait till i know or somebody else gives you an answer.
-- INTEL 9xx SOLDIERS SANS FRONTIERS
