Well, since it's a luxury liner, it'd probably have a curvy, semi-organic look. In the first pic, there's that big flat area on top. If I were designing a space liner, I'd have a large ballroom with a transparent dome somewhere, and that flat area looks like the perfect place. And since FS2 supports transparent textures, you could put a geodesic grid pattern on the dome and put the floor underneath, and have an actual transparent ballroom. Then add little models of people standing around, maybe make a few that are untargetable rotating subsystems, y'know, to add a bit of realism...
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"Who is more foolish, the child afraid of the dark, or the man afraid of the light?"
-Maurice Freehill