I'm having a problem installing a mod for Doom 3. I've already downloaded but I just don't know how to extract the files to the Doom 3 directory as instructed in the mod's readme. I'm guessing that after I extract the mod files to the Doom 3 directory, the mod will appear under the mod section of the main menu, but i'm not sure. I think the problem is that i'm not extracting the files to the Doom 3 directory because the Mod is not in effect when i play the game.