If your upto the second save point where you have a cutscene showing you companions jump up to a ledge then after about 5 seconds, disappear only to show up a second later on the top of the left building near the ladder, then I am afraid you are up to where I am and there is no fix I can find.
The cutscene seems to be a indicator for the games security check point, if you see the characters in the cut scene freeze for a few seconds, then disappear and end up somewhere else you will currently no be able to progress any further.
The first such security check point was where you had to slide down a rope, this was fixed with the release or should I say re release of a updated no cd fix on gamecopyworld. After installing this I was able to slide down the rope fine instead of just hanging there. But now I am stuck at climbing the wall.
Come Vitality, where is you HONOUR