Hide behind the statues and wait for them to move away. They back off every four or five seconds, so wait and go right as soon as you can.
Keep behind the statues until you can reach the door.
Slip out the door to the left into the main gallery and go to the painting (The Scream).
Once you duck past the Security Room, and hide behind the statues to avoid the lasers, exit through the doorway at the right and go to the painting The Scream in the gallery.
You hide behind the furniture.
If on Counterfeit Island, hide behind the plants and statues.
You go to the scream and hang above it
Make your way out the door at right and enter the gallery. Climb up on the light above the painting. (This does not work out well, but it is the only continuation to the quest.)
You can't turn them off. You have to slip past the Security room and the lasers in the Statue Room when you enter the museum at night. Hide behind the statues until the lasers move away, then work your way slowly to the door at the left side.
At night, you enter the museum through the Dragon Face hatch (use the Docks entrance to the underground). Once you get past the security room and the lasers, climb the light by the painting. (This eventually works out.)
You have the picture that shows how to move the features on the Dragon Face, and you have the key to the Supply Room. Duck past the Security Room, and hide behind the statues to avoid the lasers in the Statue Room.
You must go on the Underground Tour before you can apply for the job at the museum.
Duck past the Security Room when you don't see the shadow on the window blinds. Then hide behind the statues to avoid the lasers as you make your way to the exit at the right side.
When entering the museum at night, you slip past the security office and then avoid the lasers in the statue room. When you reach the painting, jump onto it. This may not seem wise, since you immediately get caught...but it is the next step in the quest.