Opera House - Second Time

Hint: I've got the lens, what should I do?

Hint: Help! I've been stabbed!

Hint: I've searched the Opera House, but I can't find anything.

Hint: How do I find Stiletto?

Hint: I found the dressing room, but I'm stuck again.

Hint: The door out of the boiler room is stuck.

Hint: Bricks? Could this place be more difficult to get through?

Hint: These punks are no help.