Hello everyone, I have found a working way to mod with the NXE. Requirements: 2 XBOX 360s (1 with NXE and 1 without) Memory Card. First step, Fire up the 360 without the NXE, change the map in forge and mod it like you normally would . Put the map back onto the 360 with out the update, start up Halo 3 and change the mod's description and name. Copy it to the memory card and then to the NXE xbox. This should work, it did for me.