Just to explain how is the Projects hallway:
The hallway is pretty long, with 4 branches (it forms a kind of X). One of them begins with an elevator and the one who is on the opposite finishes with a door who lead to stairs. Both of them (elevator and stairs) lead to the other boards/floors. At the end of the left branch, there are the special stairs who lead to the Yeerk Pool. I put it here 'coz it's easier for me, as I lead one of the Project and spend time in this area (this branch is the Ebooks branch). But actually, there are hidden doors who lead to the same stairs in the other floors. There are already many doors but more doors appear magically sometimes. The hallway even can change through the time, and the old members can see that it is now longer than when it first appeared. The doors themselves have various colors and forms. Some are big, some are thin...
Oh, and if you ask what is this golden door at the end of the right (and last) branch, it's a special door. It leads to Richard's office, and through it (and some more hallways and stairs) to the entrance door of RAF and the other floors.
RAF can be labyrinthic, sometimes ^^