Kiroshi, as the "old busted hotness," is going to need to have some weapons that are powerful, but not too much for its power systems to handle. I'd suggest the Qel'noran MVD-1 turrets. Check out the NovaCorp Mersina or the Qel'noran/Phoenix Byakko for details. Also, some side missile launchers might not be a bad idea.
I'm assuming the thing lands regularly (the pic made it look about Outrider size), so we might also want to include an automatic anti-personnel gun of some sort on the underside. For power, I was thinking a small anti-matter/matter reactor, or whatever you can grab from an old Minion or Wazu. Anything bigger that that wouldn't seem to fit.
For the interior descriptions, that's where this ship, being unique, gets a real chance to shine. I'm looking forward to those. ^_^
By the way, I'm really pleased how people have come together to work on this new plot idea. It was totally unexpected, but that's okay. It's looking great so far!