Need help, how do I blow up the main power supply on floor B1 cannot seem to get the right angle with the Nikita please help,have been trying at it for a month now. Thanx

After you fire the rocket, let it go to the end of the hallway, turn the rocket to the left. Once the rocket enters the room with the machinegun cameras turn the rocket right (so it is now going towards the top of the screen). Hug the right wall so the machinegun cameras won't shoot you. Once near the top of the room you need to turn towards the left a little so you can go through the doorway at the top of the screen. Once through that doorway you need to go right through the doorway to the right of the room. You should now be in the room with the circuit breaker or whatever it is called. Just get about halway into the room and point the rocket to the top of the screen and hit the machine right where you see the electricity coming off of it. That should cause a quick cut scene showing that the electric floor is turned off. Now you need to run out of the room (towards the elevator and catch your breath) then go back in and start to explore. Just keep an eye on your air supply. If it gets close, run towards the elevators and catch your breath again.
Hope that helps.

You can also use the X button to switch to First-Person View. It helps in some places, but not in tight areas.