The easiest way of capturing Command Post 2 is either by spawning as a Jet Trooper/Dark Trooper for the Republic/Empire , a Hero or Villain (as it is easier due to the flight/sprint ability) or as another unit. With the Jetpack equipped unit, jet/jump into the street with the blocked end and then jet/jump onto the building on the right of you (when you face the blocked end). If you stand near the edge facing the CP you will be inside the radius without being in much danger. If you are playing as another unit, go to CP 3 and stand on the roof from there you can sprint jump on to the buildings nearby. With some practice or luck, you can reach the same rooftop as described earlier.