It's quite simple really, you don't. It is completely impossible for a typical user to be able to spawn any type of AI in Halo 3's Forge mode.
You can't.
go to the vehical category by pressing RB...
No You Can't, Unless You Have Your Xbox Modded And Be Banned From Xbox:Live Forever, Or Just Buy Another Xbox And Mod That And Keep It Offline.
you cant relly but if your playing capture the flag just set the falgs and they'll respawn there or you could try put spawn points on one end then the opposite end of the map that way there all bunched up on eather end
You can't. =(
you cant
Go into the place where you can spawn stuff and spawn a platform and just rotate it like a wall.
u cant
you can do it on custom games , go on race and you spawn and respawn on one
You can't unless you use mods.
You can't on the regular game. But there might be a mod for it
You can't. The only way is to mod which is illegal