Description Thank you for downloading this update file from Zoo Admin.To use this update file, unzip it to your Desktop. Then move the .ztd file into your Updates folder inside your Zoo Tycoon directory, the zoo. file in the maps folderand the dThank you for downloading this update file from Zoo Admin. To use this update file, unzip it to your Desktop. Then move the .ztd file into your Updates folder inside your Zoo Tycoon directory, the zoo. file in the maps folder and the dll. in the Zoo