Well first there are a few requirments. You need to be a jedi and you need to have the cloak ability. Also, saber block is a must.
First, enter DF1 and approach the first terminal (ignore the battle droids) and click it. Quickly activate force run and go to the second terminal and click it, then to the third terminal and click it. Then, go to the forth terminal and input the code quickly. Force run should be active during this whole step. And dont worry if it doesn't work the first time.. it takes soem practice, but once you get it, its simple. Next, go down into the next room and kill the battle droids.
In the room with the sensors, clcik one sensor, force run, click the toher sensor, and then click the terminal. This should crant you access the next room. Next, go on to the elite battle droids and then OR-5. Then, go to the left terminal in the small room and click on the term thats green. Quickly force run to the right small room and click the red term. You should now have access. Countine to force run past all of the droids (past the room where doom bringer is in DF2), kill the R2 droid and the two super battle droids by wheer the gaurdian spawns and then run to the reactor to spawn the gaurdian. Attack the gaurdian as long as you can before dieing and then cloak. This should cause you too lose agro. When you're ready to atatck again (all cooldowns are up), attack the gaurdian and loot him using the /loot command or a loot macro and then leave.
Heres a video of this method in use.. It take about 5 mins to go through the factory and the lockout is about 30 mins.
http://www.youtube.com/watch?v=P-ENHZNQZT4