You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
Did you notice those troopers close to the wall throwing bombs up against it over and over again? What you want to do it grab one of those bombs and move it up through the groove in the wall. You'll have to shoot out any boulders that are still in that groove to clear a path too. Move a bomb to the top on each side and you'll be able to move on.