Ok im trying to edit BG and sidewinder for a friend and everytime i try to import a vehi i get an error saying contact my closest bungie owner or something whats wrong?

You're missing tags. Find the file called debug.txt inside your Halo Custom Edition folder, and copy the last few paragraphs. Paste them here.

here is the debug txt!

06.02.09 15:17:47 sapien pc 01.00.00.0609 ----------------------------------------------
06.02.09 15:17:47 reference function: _write_to_error_file
06.02.09 15:17:47 reference address: 401b13
06.02.09 15:17:47 Couldn't read map file './sapienbeta.map'
06.02.09 15:17:48 CreateDevice succeeded with refresh rate = 0
06.02.09 15:17:50 Increasing sound decompression buffer size to 1048576 bytes
06.02.09 15:18:56 local player 0, weapon (0x0), deleted unexpectedly


06.02.09 15:58:04 sapien pc 01.00.00.0609 ----------------------------------------------
06.02.09 15:58:04 reference function: _write_to_error_file
06.02.09 15:58:04 reference address: 401b13
06.02.09 15:58:04 Couldn't read map file './sapienbeta.map'
06.02.09 15:58:05 CreateDevice succeeded with refresh rate = 0
06.02.09 15:58:07 Increasing sound decompression buffer size to 1048576 bytes
06.02.09 15:59:21 local player 0, weapon (0x0), deleted unexpectedly
06.02.09 16:00:15 file_open('tags\vehicles\fighterbomber\mp\mp.gbxmodel') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:15 couldn't open gbxmodel tag 'mp.gbxmodel'.
06.02.09 16:00:15 file_open('tags\vehicles\fighterbomber\mp\mp.model_animations') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:15 couldn't open model_animations tag 'mp.model_animations'.
06.02.09 16:00:15 file_open('tags\vehicles\fighterbomber\mp\mp.model_collision_geometry') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:15 couldn't open model_collision_geometry tag 'mp.model_collision_geometry'.
06.02.09 16:00:15 file_open('tags\vehicles\fighterbomber\mp\mp.physics') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:15 couldn't open physics tag 'mp.physics'.
06.02.09 16:00:15 file_open('tags\sound\sfx\vehicles\jetsweet.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:15 couldn't open sound_looping tag 'jetsweet.sound_looping'.
06.02.09 16:00:15 file_open('tags\sound\sfx\vehicles\pel_wind.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:15 couldn't open sound_looping tag 'pel_wind.sound_looping'.
06.02.09 16:00:15 file_open('tags\sound\sfx\vehicles\pelican_engine.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:15 couldn't open sound_looping tag 'pelican_engine.sound_looping'.
06.02.09 16:00:15 file_open('tags\vehicles\fighterbomber\missel\misselbomb.weapon') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:15 couldn't open weapon tag 'misselbomb.weapon'.
06.02.09 16:00:15 file_open('tags\camera\fighterbomber_large_loose.camera_track') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:15 couldn't open camera_track tag 'fighterbomber_large_loose.camera_track'.
06.02.09 16:00:15 file_open('tags\vehicles\pelican\effects\pelican landing dust.effect') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:15 couldn't open effect tag 'pelican landing dust.effect'.
06.02.09 16:00:15 failed to load vehicle tag 'vehicles\longsword\fighterbomber tags\fighterbomber\fighterbomber_mp'
06.02.09 16:00:47 file_open('tags\vehicles\pelican\pelican.model_animations') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:47 couldn't open model_animations tag 'pelican.model_animations'.
06.02.09 16:00:47 file_open('tags\scenery\halo_destroyed\bitmaps\halo_explosion_flares.bitmap') error 0x00000003 'The system cannot find the path specified. '
06.02.09 16:00:47 couldn't open bitmap tag 'halo_explosion_flares.bitmap'.
06.02.09 16:00:47 failed to load lens_flare tag 'vehicles\pelican\effects\pelican explosion_core'
06.02.09 16:00:47 failed to load light tag 'vehicles\pelican\effects\pelican explosion_core'
06.02.09 16:00:48 failed to load effect tag 'vehicles\pelican\effects\pelican explosion'
06.02.09 16:00:48 failed to load model_collision_geometry tag 'vehicles\pelican\pelican'
06.02.09 16:00:48 file_open('tags\vehicles\pelican\pelican.physics') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open physics tag 'pelican.physics'.
06.02.09 16:00:48 file_open('tags\vehicles\pelican\pelican afterburn.light') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open light tag 'pelican afterburn.light'.
06.02.09 16:00:48 file_open('tags\vehicles\pelican\pelican afterburn.light') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open light tag 'pelican afterburn.light'.
06.02.09 16:00:48 file_open('tags\sound\sfx\vehicles\pelican_engine.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open sound_looping tag 'pelican_engine.sound_looping'.
06.02.09 16:00:48 file_open('tags\sound\sfx\vehicles\pel_wind.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open sound_looping tag 'pel_wind.sound_looping'.
06.02.09 16:00:48 file_open('tags\sound\sfx\vehicles\jetsweet.sound_looping') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open sound_looping tag 'jetsweet.sound_looping'.
06.02.09 16:00:48 file_open('tags\camera\airplane_large_loose.camera_track') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open camera_track tag 'airplane_large_loose.camera_track'.
06.02.09 16:00:48 file_open('tags\vehicles\pelican\effects\pelican landing dust.effect') error 0x00000002 'The system cannot find the file specified. '
06.02.09 16:00:48 couldn't open effect tag 'pelican landing dust.effect'.
06.02.09 16:00:48 failed to load vehicle tag 'vehicles\Program Files\Microsoft Games\Halo Custom Edition\tags\vehicles\pelican\pelican'


06.02.09 19:33:46 tool pc 01.00.00.0609 ----------------------------------------------
06.02.09 19:33:46 reference function: _write_to_error_file
06.02.09 19:33:46 reference address: 42ca20
06.02.09 19:33:46 Couldn't read map file './toolbeta.map'


06.02.09 19:42:16 tool pc 01.00.00.0609 ----------------------------------------------
06.02.09 19:42:16 reference function: _write_to_error_file
06.02.09 19:42:16 reference address: 42ca20
06.02.09 19:42:16 Couldn't read map file './toolbeta.map'


06.02.09 19:49:54 tool pc 01.00.00.0609 ----------------------------------------------
06.02.09 19:49:54 reference function: _write_to_error_file
06.02.09 19:49:54 reference address: 42ca20
06.02.09 19:49:54 Couldn't read map file './toolbeta.map'

See all the file_open errors? You're missing those tags. Don't try to add pelicans or longswords into a map, unless you're sure you have all the tags. Which you don't. Rip them from hugeass.