in multiplayer they respawn by themselves, but in forge press up on the dpad and press "x" and use right bumper to go to vehicles and find 'scorpian' press 'a' then 'a' again to put it down. in campaign, it comes when people deliver them, which happens only twice...you should know this...READ THE MANUAL AND BE NORMAL!!!!!
spirits are not in halo 3
No. You can only access them in campaign
you cant
You can't. =(
u cant
Go into the place where you can spawn stuff and spawn a platform and just rotate it like a wall.
You can't, it is not possible to spawn as one without the use of mods for the game.
You can't unless you use mods.
you cant saddly there is proble a mod out there thoe
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
Technically, every single one of them, but that relies on the map's size. Also note that the celestial vehicles ar too big and/or powerful to be spawned and so are not there.