How exactly does it work? I'm working on a new map for my server and I want to include custom overlays and custom music that can be played through buttons in a secret room. I've Googled around abit, and I must have missed something because I couldn't find a good tutorial for how to use PackBSP and put custom textures/overlays/sounds/etc into a map and have them automatically be downloaded with the map. Good example of this is achievement_turbo_v13fix. Map has tons of custom overlays and such, and you don't have to download any files other than the map. So uh yeah, any tutorials on putting custom overlays/textures/sounds/props/whatever into a map and having them be downloaded with the map?