What about escape pods or lifeboats? At the fore and aft ends of the Jefferies tube? What do they look like?
I'd go with the jettisonable forward cabin only. It gets a bit awkward when one tries to draw an internal bulkhead at the most probable line of separation, the "ridged collar" aft of the doors... But it can be done. And if escape pods existed, I'd think we'd have heard of them at some point.
As for other emergency gear, I'd perhaps have those emergency beacons we see in "Vortex" stored in the little boxes that surround the warp core pillbox.
The Jeffries tube would probably run along the spine, above the central corridor but just below the warp core. There'd be a pull-down ladder there for accessing the tube from the central corridor, and perhaps short transverse branches for reaching the pylons.
Damn how I'd like to find the website where that one artist with the German-sounding name (Weissman? Something with a W and twin consonants) had all those bridge blueprints and runabout interior plans! Anybody know what I'm talking about?
As for the Delta Flyer, good luck! You'll need it... Probably the most challenging part is figuring out how one enters or exits the craft. Then again, it's even more difficult with the assorted TNG movie shuttles!
Timo Saloniemi