so what I did was:
I took my reinforcement ROM which creates a wingman at the gate
and I took a playership and added a single dock port to it (like the salvager nomad store mod)
Then I modified the ROM so that instead of a wingman, the ship spawned would be ordered to dock w/ the player ship. It won't always line up right... Also, new craft that are smaller than the playership will look pretty stupid since you can still see your old ship on the bottom.
I never tried it but I don't think turning will cause the docked ship to turn.
Shooting your weapons will simply shoot the docked ship.
So yeah, it was a failure, but it's apparently the closest we'll ever get to changing playership graphics in-game...
