@Sandmarine
Do you have Unreal Tournament 2003/2004? If yo, you can easily model the hallway and doors in UnrealEd and export them as .obj to Poser.
UnrealEd is way easier to use than Shade and it saves you quite some bucks.

Otherwise a Shade user could create your hallway and doors within a Minute by using the roomplanner.
The doors moving parts would take many more minutes, but you can use some Poser prop for this instead.

[Edit]
The possible issue with copyrighted textures from Shade should be taken into account.
Leaving the mesh untextured or using the textures that come originally with Poser or creating new ones are safer ways.
If you can not texture the plain mesh, with proc shaders, the Shade user could also make a pz3 after importing to Poser and texturing it with standard texs.
[Edit]