If the pack file adds new data it will simply be added to the data the game has already loaded. Always make a new packfile containing the tables and other items you’ve changed. Never edit the packfiles that come with the game. The ModManager program (see below) is of huge help here. The C:\Documents and Settings\username\Application Data\The Creative Assembly\Empire\scripts\user.empire_script.txt file contains a list of mod packfiles that will be loaded on top of the default pack files. User mods an be created by making new packfiles with their type set to “Mod”. The game recognizes these pack files and reads the game data from them. When you open Steam\steamapps\common\empire total war\data you’ll see a list of. I’ll explain the system and give you links to a few essential programs to make modding ETW a pleasant experience.
Making mods and distributing them is much easier than before thanks to a special file system. Empire: Total War is, much more than previous Total War titles, made to be modded.