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Half-Life: Opposing Force Hints

Friendly Fire

How do I break through the locked metal door in the lobby?
The conference room dead-ends, and the nearby red door is locked!
Where do I go in office B-591FG?
How do I get across the room with the two dangling electrical wires?

Where do I find an engineer to blast open the entrance to the Lambda Sector?
What is with the Black Ops' orders?
How do I open the tunnel access doors?
Where do I find the switch to the crossing barrier blocking the tram tracks?
Where do I go after the tram ride?

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