Test this map. Paste it in your HALO DEMO > MAPS. If there are any problems try renaming the map bloodgulch.map. Please note this was made on a mac so it might not work on PC halo trial.
Lately I have had to backup 3 of my map files do to modding. so after I had to look through 3 hard drives to find the original bitmaps file, I decided to just backup all 5 map files: Bloodgulch.map, b30.map, Bitmaps.map, Sound.map, and UI.map. After
This file includes the... A: Custom Mapping Team(CMT) User Interface(UI) that enables campaign mode in CE. B: The maps needed for playing campaign.([All CMT]A10, A30, A50, B30, B40, C10, C20, C40, D20, and D40.