we're making progress on that model, Jorj.

We've gotten the framework for the decks worked out now. Now all it needs it division into rooms rather than open areas.
Not really sure how that would work, so we're including a couple of images here, one with the deck shapes and dimensions.

[img=http://student.umb.no/~henrgj/Extragalactic/EE006]

[img=http://student.umb.no/~henrgj/Extragalactic/EE007]

We imagine that most of those decks would be occupied by the automated systems of the ship. perhaps two-three decks at most used by the crew.
The entire rear half of the ship is used by engine systems and other automated things. 

Anyways, from the top:
[b]Deck 01:[/b] 115x24m = 2760m²
[b]Deck 02:[/b] 115x46m = 5290m²
[b]Deck 03:[/b] 115x50m = 5750m²
[b]Deck 04:[/b] 115x50m = 5750m² (has airlocks)
[b]Deck 05:[/b] 115x50m = 5750m² (has airlocks)
[b]Deck 06:[/b] 60x50m = 3000m²
[b]Deck 07:[/b] 60x50m = 3000m²
[b]Deck 08:[/b] 60x45m - 15x30m = 2250m² (has cutout on bow end)
[b]Deck 09:[/b] 35x20m = 700m²
[b]Deck 10:[/b] 30x10m = 300m²
[b]Deck 11:[/b] 30x10m = 300m²
[b]Deck 12:[/b] 13x30m = 390m²

If anyone has suggestions for how they should be divided up, it'd be much appreciated.