The original had manual ones, but sure.
I sticked with the manual ones, I first had problems with the manual doors and i considered of changing them but the problem is now fixed, Also i might release a demo when demian has finished with his modelling.
What do you mean by design rooms? If you mean by blue prints or something similar I could be of some help.
Well if you have modelling experience you can help us. What i'm expecting is levels based on blueprints. The current first level has problems with occlusion zones causing weird clipping errors. If you want you could make assets for the different parts of the environment, For exaple: Tunnel parts, Rooms, and so on.