Go into the doorway where the Dark Jedi is, kill him and continue.
There will be a cutscene, and a Dark Jedi will land infront of you, kill him.
Jump onto these blocks and over to the force field to the blocks left.
Use the crane to get to where Alora was, there will be a cutscene.
Then its time for your decision, attack Rosh and fall to Darkness, spare him and be a true follower of the Light. After that, kill Alora for end level.
Ok, I have the remaning levels written and screenies taken, I'll host the screenies and get them all up today or tomorrow