To install TEd, players have to go to their Game library, and install the greyed out "Total War: Shogun 2 - The Editor".
TEd is a very user-friendly editor, allowing players to completely edit the terrain. The editor also has hundreds of battlefield props like trees, buildings, railway lines, and coastal batteries. The only thing players cannot do is edit the Campaign maps or the game AI.
In addition, players need not own a customized map in a multiplayer match if the host selects one.