Hey Galactic Emperor. I have an extremely good, new version of the port. Almost as good as freespace1. I need to get it on the web, and I would like to put it in your extras page.
EDIT: Its got TVWar ships, but only a few.
EDIT2: I just thought of this a couple days after posting this. Why not have the asteroid as the first entry in the ships table, and then edit it at the bottom (at the very end) so that default ship is the asteroid, not the Ulysses. Of course then every time you opened the mission you would be crap about invalid player ship, but still, a last resort.
You could also open up the mission in a text editor, then change the ship class.