[handy388]

I was playing FS2 vanilla with 3.6.8 inf build (latest one), and in one mission a bug occured where I could select ANY ship in the gaming (including the Knossos and the Sathanas), and I could pilot them, they took damage, and the beam turret was working.

I wonder if anyone can create a mod where you can fly turret-enabled ships from Fenris to the Colossus.

[Polpolion]

It's possible just through table editing, I think you just add the Player Flyable flag or something. You wouldn't be able to shoot though, because all of the weapons on capships are turrets, not primary or secondary banks. The turrets would shoot automaticl (like on the bombers Ursa and Medusa).

There was a mod that you were a Deimos corvette, I can't remember what it was thought, ( if anyone dose know what it was, tell me)

[Nuclear1]

There was a corvette campaign like that, yes, but there was also a Fenris one available here.