All right, after moonman and subliminal posts, the marines can begin
You guys will have to make your way to the ship. It doesnt matter if it is not your ship, the entire place is in total chaos. Things blowing up, rooms depressurizing, fires, etc. You can auto damage to the shipyards or some NPC deaths if you want. Take your time, I dont expect everybody to be onboard until atleast four days form now. You can meet up with the other marines along the way too, heh.
FIANEDIT: You dont need to be with Ian Mcain if you want to. You can start anywhere but just get on the ship.