I'm stuck at the part where you need to replace the pulley at the cable car thing. There's only one crate there and I've tried pushing and pulling it almost everywhere. Also is the whipping thing above the dart trap just another method of getting pass the darts? Why not just jump over the pressure plates or walk by the side.

You need to go back to where sophie let you in, and jump across... When you get to the 4 crates, move them so the biggest one can open

Do you mean where Sophie lifted the gate or where Sophie dropped down the ladder or the large room with the lava monkey statue? Do you push/pull the boxes with the control key?

As soon as you meet Sophie and she opens the gate for you , she goes away ... You probably went down the path there .... Ok .. Go down to your left is a diamond .. take it go back up .. there is a small platform at the right if you r facing the gate run and jump .... follow this .. use the infernal machine part and crack a few walls when required then you will enter a room with about four boxes .... move the first three back . One will open automatically revealing the Pulley ... Good luck!

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Badboyz - Whatcha gonna do when they come for u !!!!