Still stuck.. I can't think of anything extra to do to gain time on 12-06.. as far as I can tell you just have to do it ad nauseum until you pick up the extra fraction of a second somewhere to bump you from 96 to 100.
Here's what I'm doing:
Run right, climb ladder
Point comp. to stand on button while climbing
Walk right into door until it rises, climb to ledge
Take key, turn around, jump left
Tell comp. to "follow me"
Take a couple steps left, jump left then drop immediately
Walk right, unlock then open door
Walk right, take item, step right then use it
Run right then bang on B until I can escape
..The only places I can see to improve this are getting the comp. to move more quickly after using the bridge item, but you can't start moving the arrow to tell him where to go until you use the item (because the arrow resets), and by the time you point him all the way to the door you could have started running anyway. Is it just that I'm doing the right thing, but the they set the 100 time limit insanely low?