Remove all codes from wrecks, and make a sequence what'll spanw at restart a few random NPC ships to a random factions with a random code guns. That will make things interesting. You maybe get lucky and find a Phoenix Lazulite (your dream gun) on a Starflea but who know...maybe the next gun is on a Jelly BS....and just to not let the wrecks float around pointless, give them some expensive cargo.