To pass the Security Room, wait until the guard's shadow is no longer on the window.
You have to get a balloon.
At night, when you sneak back into the museum, that is your plan to catch the thief. It does not work.
You climb the rope above it.
you sneak along the first level and jump behind the guard on the far right. wait till the woman guard reaches the end and turns around. sneak up behind her and jump on the couch to get to the key scanner. the key card is on the dock. the Guy drops it after you chase him
Sneak out and hide behind statues go through the storage room door and you will be by the dock.
No websites right now (December 2009). You can check the related links below.
all you do is get a balloon and sneak past them but pace yourself.
You can't not get caught so when you do sneak up behind the one in front of the couch and jump up on top of him
Stay on the bottom level until you get to the left side, and the jump up on the boxes behind a guard. Then, if you time it right, you can jump to the third level, sneak past the guard, and onto a very bouncy couch. Then you use the Black Widow Card Key, to get into the locked door!
in the cave you get a piece of the picture, and once you have the whole picture you copy the picture on the lock in this big dome above your head, and it will get you into a secret door that leads you to the supply closet so you can sneak into the museum at night to "protect" the painting
Go along the bottom level until you get to the end. Climb up behind the guard and get above him on the boxes. When you see the female guard (third level) walk over and turn away, jump up and sneak behind her until you get near the chair. Jumping on the springy chair should send you up and left to the locked door. (You have the key card.)
Hide behind the statues and make your way to the right when the lasers move away. Eventually you can make a run to the gallery door.