i know these 5
1) on the 1st side of the mountain (where you start) go all the way up to the top until your hanging onto the snowy ledge ready to jump up and smash the wall to go through. Dont go up, instead carry on shimmying to the right and you can climb up and get silver #1
2) on the other side , you will jump across, slide down and then slide down again and you will be on a steady platform. You then have to run across the part that will fall so you jump onto the swining pole and then grapple across. Ok now that you are on that ledge look behind you at the wall (use RAD if your not sure) but there is a fragile part of the wall. Shoot it and jump across for silver #2
3) when you get to the open area where you have to fight all the men (the area with alot of explosive barrels), look at the wall to the left (from a view of when you are entering the room) there is another fragile wall which u can smash by shooting it, revealing silver #3
4) when you are jumping across the moving ice platforms along the icy water, carry on going and jump onto the platform on the left, the silver is very easy to spot. So jump over there and get silver #4
5) when you enter the main tomb area, (before you have swung across to the other side) quickly kill the snow leapoard and run down the left flight of stairs. As soon as you get to the bottom look at the wall (use RAD to exactly locate it) and there is ANOTHER fragile wall. Smash it and get silver #5
theres another silver isnt there? hmm ive forgotten where the last 1 is but i hope that helps