Say for instance I wanted to change all of the games dreadnoughts to use the Cravers model.



How would I do this?

I don't know this for 100% certain, but I'm fairly certain (80%ish) this is controlled through technology



If you go to the Simulation/TechnologyExpansion.xml, you'll see that every technology that unlocks a ship class has a specific variant for each race. For dreadnoughts, this is controlled by TechE16. What you'd have to do is change every instance of:

ShipClassLarge1Terran

Or whatever faction you want to change, with

ShipClassLarge1Swarm

Since these are just hull models, it should unlock the ship type independent of faction. If you wanted to change the base ship designs (scout, defender and colonization ship), those require editing of the ShipDesign.xml instead of TechnologyExpansion.xml. You'd just have to change the hull model on each design type like you did with the one technology group



Hope this helps!