Lost: Via Domus Cheats

Instead of bartering for Fuses to complete puzzles, use the following trick. After completing the first Fuse puzzle, return to the puzzle, and collect all of the Fuses. These will remain in your inventory, ready for use for other puzzles.

To rescue jack and kate at the black rock in episode vii stand infront of them and shoot your gun at the dynamite that is on top of the crates in the room straight ahead.