I'd suggest only using them on the fuselage itself - almost all of our living space is there, and it makes a little visual cue that this is where the people are - even though there may be a few folks out in the cargo area as well.
I'm spending my day in LW Modeler, Coreldraw 9, Illustrator etc - and when I flip over to TrekBBS for a moment my hand thinks it should be able to zoom in on
Vektor's drawings by spinning the mouse wheel.