to get past guy next to lockers, have him throw away the paper, and as he returns, open a locker door to smash him in the head to knock him out. then find a screwdriver in the lockers and unscrew the vent
great game, currently stuck on lvl 23, but shouldn't take to long to pass. Speed the game up just a little, and get rid of the stupid level in/out animation. it was cool the first time, now its just annoying