You can't. You can blow it up but you can't board it.
No
NO
No there is not a mod
Phantom Halo - 2014 was released on: USA: 2014
There is but idont know how to do it i think only bungee employees know how
No, but you can board, walk around on them and destroy them.
you cant.
Glue
You cant
Poo your pants
you get it on new alexandrea as a cheat
There are some glitches that you can exploit in halo 3, like super destructive weapons in forge and no text in halo main menu. However, for more common mods like actually driving the scarab or piloting the pelican/phantom, you have to have a dev mod. You can get that developers kit from Microsoft or Bungie.