I decided to do the same thing a while back for my ODST and I'm going with two biofoam containers and the halo 1 health-pack. on the chest and the back crown of the helmet I'm doing the snake and cross you see on the ambulances and i might go with a white paintjob, i know ill do red details on it. if i were you id make it ABUNDANTLY clear to anybody that your ODST is support based, go with an smg and a pistol and have a bunch of health-packs and biofoam canisters.