At some point I may make some proper 'damaged interior' textures, because I'm not really happy with the look of the damage tile on large ships (plus I want to avoid using Volition maps altogther nowadays); I still have to do debris for the Damocles plus...er....a very cool thing that's not original nor and HTL-isation but is still going to look **** hot if done right.
If anyone has decent piccies of something like, say, the Bismark, that might help as a basis I think.
Incidentally, from the FS2 intro it appears the hole uses the same map as the exterior hull (the dark blue one); of course, they have the advantage of being able to pick and choose their lighting and overlaying that girder stuff.