The shot with the suitcase can be a little tricky insofar as there are two possible hiding places in the room - on is to your right, one is to your left (after entering the room). You need to hide in the place to your left; it's like a small cabin with wooden decoration. Also, you have to zoom in to the maximum to get a clear shot - the two men will exchange the suitcase while standing in front of the desk, so zoom in on that area and wait until they are about to exchange the suitcase, then try to get the picture. It's not as difficult as it may sound; I found the shot you had to take in the shop earlier in the game a lot trickier because by then I didn't know you could move your character with the keys while in "photo-mode"