1. You go to the 2 ladders in small map (the ones with a statue next to them)
2. Go up the right ladder then on the right side there will be a little ledge go over on it.
3. Take out your rocket walk back a little bit, look down you should see your foot make sure
the front of your foot is over the gray strip. (following me so far ?)
4. Now make sure your guy is facing the wall in front of you
5. Walk a little bit to the right and hold left and keep pressing x until you climb it with the rocket

Please note that you have to hold left even when you are falling it helps and also try to have nothing
but the rocket launcher because too much weight will not let you climb it.

You could always do the universal skywalker anywhere method with a c4 if you wanted. Look that up in
the universal section.