Tech Demo map porting.

[Fatalist]

It is possible, but not easy.

Maps in Penumbra - .dae files. You can place it in level editor, like a static objects.
At first, create new .mat files for all textures, used in original map.
At second, recommended open map in 3d editor, like Maya and delete all script area, monsters, monsters pathnodes, ps, sounds, "portal room" and "start link" areas.
After all steps you get a clear map (.dae file) and can use it in game, without issues.