There's an easier way to get into the traitor room that ledjohnny and me found some time ago.
I can't remember how it exactly worked, but it was something like this:
Get a traitor and an innocent in front of the entrance to the trap room.
The traitor has to crouch inside the entrance now so that the innocent can jump on top of him.
Eventually, you get this sort-of-stuck situation where the innocent floats in the air until the traitor moves.
Now the TRAITOR (NOT the innocent, durr) has to press the button and tada!
Both are in the traitor room!
Could be fixed by now though ...