on the mission that bentley plays the suport beams are ... well the first one is after you
blow up the first gaurdand the fence and you talk to sly, it is to your left. then go up
the stairs. their is a guard. sleep dart him then blow him up.after you bomb the gaurd
look to left. after that blow up the the fence. then their is another gaurd. sleep dart
him, then to your left their is another. then go to the weird stairs then look right. If
you still can't find the support beams then just press the R3 button ( or right anolog
stick) then their sould be markers to where they are. Also you don't make the peacock fall
untill OP: TunderBeak. Another thing durring that mission if you jump over all the lasers
( and make it over to the next side) distroy the music stuff, and you will here the Grease
Sweet music in the background!