I like the look of these. I believe: korn_2 and korn_3 are two- and three-door units respectively, but nothing opens. So I hid them both and concentrated on the cubes. On Layer 7, Cube.005 is a two-door unit replica of korn_2. Cube.004 is its single drawer, that opens easily using the manipulator translate widget. Cube.003 is its two-door frontage, and there is a mirror modifier, but I can't find a way to open either of the doors. I was expecting to be able to rotate them on their outer edges. How should I accomplish this?

doors of kom_2, and kom_3 have separate mesh, so you go to edit mode, hit one of the vertices's of door, and handle of the door. Press ctrl + L, and rotate Z-axis.