Open the map using the "World Editor" program that came with WarCraft III. Files ending in.w3m (Reign of Chaos map) and.w3x (The Frozen Throne map) can both be opened by The Frozen Throne's. In these eternally contested lands, war comes and goes leaving behind death and glory. Strike strategically and fight valiantly till your foes fall and you can hear the snowflakes land on the dead. Warcraft III: The Frozen Throne adds a host of new features to the game, including four new campaigns that take you across the frozen continent of Northrend. Explore new maps and master new units such as the Troll Bat Riders, the Blood Elf Spell Breakers, and the destructive Mountain Giants.