Kill him, then hop down here for a secret.
Then go down here, kill the Dark Jedi, and jump across.
Kill the baddies on the other side, and go down the ramp.
Hop across here, and go left.
Go around on the walkway, and then hop down here, then keep hopping down until you get to the lower level.
Go around this way, and hop off to the right.
Jump the gap and go all the way to the end.
Jump on here to get up.