you gotta extract the zip file and place its content (The StandaloneXxx folder) inside of a new folder called NeoCosmos. The folder structure should look like NeoCosmos/StandaloneXxx. Then copy the NeoCosmos folder into your ADOFAI installation folder and open the game. If you are on Windows and it gives you an error, try placing both StandaloneWindows and StandaloneWindows64 in the NeoCosmos folder.