Hope this gives a clear picture of how the levels fit together.
Deck 7 is pretty much a facsimile of the original Desilu stage 9 design, minus engineering and the living quarters. I know that logically that sickbay would probably be further away from the transporter room and briefing room, but this project isn't meant to be a deck by deck representation and is more a setting for a game. I plan on adding the armory and the security section down the upper left radial corridor.
Deck 19 has a long way to go. In the screenshot, you can see where I've placed the dilithium control room in relationship to main engineering. I know that the dilithium control room actually opened up into a larger room on "The Alternative Factor", but for the purpose of the mod I've placed it opening up into a corridor. Directly across the corridor from this room is the ladderway up to the Emergency Manual Monitor.
Directly aft of engineering will be a large cargo bay, followed by the shuttlebay. Other areas I plan on adding are a Chief Engineer's office, an engineer's mess, and possibly some quarters for the engineering staff.
And just to satisfy any other curiosities, here is a list of all the decks and areas either complete (*) or planned (I'm using Mike Okuda's deck layout
Deck 1 - Bridge*
Deck 5 - Officer's Quarters, Crew Quarters, Officer's Mess, Ship's Chapel
Deck 7 - Transporter Room*, Briefing Room*, Armory, Security, Sickbay Complex*
Deck 11 - Phaser Control Room
Deck 19 - Engineering*, Cargo Bay, Shuttlebay
Other areas I may add (deck placement to be decided) - Computer Core, Library Lounge, Bowling Alley, Gymnasium, Ship's Theater, Observation Lounge
Can anyone think of any more areas I could add? Things like the bowling alley will probably be Easter Eggs.