I've received several requests for various original Halo Trial maps, so I went ahead and uploaded them all.  I did a fresh install of Halo Trial before I packaged these, to make sure they were clean, unmodified map.  They're all self-extracting exe's that extract to the default Halo Trial folder.

bloodgulch.map - 4.13MB
b30.map - 12.2MB
bitmaps.map - 19.7MB
sounds.map - 53.2MB
ui.map - 330K