Here is how to travel great distances with a Dark Trooper. First, turn off friendly fire on the main options menu. Next, go to a level with a lot of space, such as Kashyyyk or Bespin platforms. Now, be the Empire and select a Dark Trooper. Here's the tricky bit : throw a grenade at the ground, then RIGHT when it is about to explode, jump over it and activate your jet. You should travel very far in the air. Sometimes, you will go strait up in the air, not go too far, or not go anywhere at all. The key is practice. Trust me, after you master it, it is fun playing around with this glitch. Have fun, good luck, and enjoy!