The 4_heroes.rar file you have requested: Maps / Multiplayer / 4 Heroes - 20.7kb is not available. Perhaps try browsing all files for the game Battle for Middle-earth II and upload any files you want to share or are missing. This is the only information we could locate:
Your custom heroes must defend against an onslaught of enemies. Currently 8 waves, but will update to add more depending on the feedback.