Hello! Welcome!

A) Crossfire continue the storyline.
D) You can add ships through the dot inis. You can add the ship in DATA\SHIPS\shiparch.ini, then you need to add a new good entry in DATA\EQUIPMENT\Good.inis and finally you must add the ship into the room of a station in DATA\UNIVERSE\SYSTEMS\Desired system\BASES\ROOMS. As for the cobras, their is an Elite Ship pack.