The "additional" monitors I was referring to are that on the later STS misisons, the crew brought with them additional video monitors, they were generally deployed on the sills of the rear windows that overlooked the Shuttle Payload bay. They in a sense provided MON 3 and MON 4. Not as if it is neccessary and all the robotics in the missions in the current version of the sim are able to be done without them. Just a thought that crossed my mind when I saw you added the egg timers.
What would be more impressive than the additional monitors would be some sort of simulation of the RPOP display. It is displayed on a laptop, which would be quite difficult to implement I would believe, so maybe just a pop up window.