I'm stuck a the part in peru where you have to put boulders on pressure..

The very irst boulder you find, you should put on the right hand side pressure pad, and then you should be able to see the other boulder high up on top on the right hand side.

When you put the boulder on one of pressure pads at the side ladders will open up and you will find a boulder at the top

You climb up on the big statue on the back wall, climb up as far as you can on the left side. Then you jump to the broken ladder to the left you can make it. Then jump to the pillar to the left. Grab the wall ledge just above it,and move to the left,jump across the two gaps and keep going till Lara hangs above a pillar,drop dowm to it.Jump to the hanging rope,turn to the left to face the broken pillar.Climb further up the rope, begin swinging to the ledge just above it. When you have high enough swing, leap forward and grab it. Jump up to the ledge just above it, then move along to the left. Jump across the gap to your left and continue untill you reach an opening.Pull yourself up and head to your right to find a fourth boulder (you may want to turn on your light to see better), push it forward: it will roledown and destroy the wall below. Wait untill it falls to the ground below, then drop down onto the pillar. Now jump over to the top of the statue to your right, and make your way back to the ground.Grab the fourth boulder and push it onto the center floor switch, which now has two on it. This will cause the alter to rise,collect the Gold Reward from under it. ((I hope this will help you))