Hello, do not install under mods. Read the provided ReadMe file for the clearest instructions. I was having trouble as well but now I am playing. Make sure you extract the *contents* of "mapfiles" to the Muldraugh folder found in steam/steamapps/common/projectzomboid/media/maps/Muldraugh, KY . Do not stick the entire folder into it, just the contained files. Then, take the *entire* New Denver folder, folder and all, and put that in your steam/steamapps/common/projectzomboid/media/maps. This should do it. If you've done these things and it still doesn't work then I am not exactly sure.