Several questions address the reboosting procedure for the ISS. When the shuttle reboosted the station, apparently the entire ISS was modeled on the ground and pre-programmed in, down to the masses and positions of all the modules. Since the crew is mobile mass, it would affect the mass distribution of the station. Granted, they only weigh ~80 kg a person (there are 6+ of them with the shuttle present), and the station is 420 tons, however if all the crew moved to the far right or far left of where the shuttle attached, it could tip the mass balance significantly.
Were there procedures for crew positioning during shuttle reboosts of the ISS? Were they told to just hang near the middle of the station for the reboost? Or perhaps they were just so insignificant a mass compared to the station that the deviations could be corrected for during the reboost.