How to install the Big Map and Unofficial - extensions to use with the game-version 3.0. 1. Download the main module and don’t rename the file. It should be “BattleCry_3.0.mod” in this case. 2. In the same folder where the module is saved, create folder for the extensions with the following title: “BattleCry_3.0_ext”. 3. Download the "BigMap" and "Unoffical Scenarios" extension in this created folder. 3. That’s it. When you load the Battle Cry module (via the “Play Module” button as normal), the extension should automatically be loaded into it and this should be noted in the chat window when Vassal opens.