The e1m1.zip file you have requested: Maps Levels Missions / Single Player / E to F Titles / E1M1 The Hangar Map - 995.42kb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
This is a Single Player map for DOOM 3 that is a remake of the original first level of DOOM 1. It is entitled "The Hangar".