Go down to the sand, walk as far to the left as you can, when you come to the pit get onto the broken piece of wall (it looks like a rock) and jump to the other side, then keep walking around the pit untill you get to a black pillar with a piece of its back broken off, get behind the pillar, use force push, and walk across. You should be able to do the rest yourself.
Well, I was never able to make that jump so here's what I did.
When you come out and go to the left you'll see a pit that's not bottomless. Off to your left will be a doorway in the wall--that's where ya wanna get to. Jump into the pit and therell be a little entrance that winds it's way up to that door and from the door you can jump to the left and run around the pit that is by the black pillar.
Just finished the game lotta fun. Prolly gonna play again as soon as I find the cheat for dbl and dual saber from start.
Hope it helped.