The a30.map file you have requested: Maps Levels Missions / Miscellaneous / A to B Titles / Jackle/Pelican/Covy Dropship - 36.22mb is not available. Perhaps try browsing all files for the game Halo: Combat Evolved and upload any files you want to share or are missing. This is the only information we could locate:
This is for the campaign level Halo. This turns the pistol and frag grenades to pelicans. Also all boulders are covy dropships and changes some enemies to jackles.