Go to terrorist spawn behind bomb house (spawn1?) or seal spawn by water near back of terrorist bomb house (spawn1?) If you go down to where the bridge is that you can't cross , theres a small ledge on the right (terrorists), or on the left for (seals) once up the hill. The ledge is relly close to the ground but there is one spot that you can hang from enough that you have to pull yourself up. Once you pull yourself up,switch to rockets & go to prone. Move your left analog stick down so you go off the ledge to the point that your body is at an angle. Then without touching right analog stick push triangle & then rapidly push X. This one is alittle harder since your really dont fall to far.
Once you do it, it really won't look like your that high (only ground level) but you can walk over to the bridge & almost get over the blockades. To get past them go over the water then onto the bridge through the beams. I almost made it to the town you can barely see... Credit....? , if found already.

I didnt know you could do a Skywalker in Socom 2. huh.