Nice work! If you want to disable the invisibility you can go into (it's been a while) .scnr and search for "campaign type" (or something along those lines), change "campaign type" from Dervish to Masterchief. Then go to .matg and go to "player representation" and change the tab to 0-4, there'll be three nulled boxes, just make the third person unit biped - Marine then give it the ODST permutation you desire.
This'll allow for a blue hud (like MC) and disables invis, so it's a tad more realistic, if you're going for that.