It may end up being a little simpler to start from scratch, but one approach might be, change your picture to a 3D layer, create a camera and create pickwhip expressions to your already keyframed layer. This layer will be your “camera control”. Duplicate the layer and break it apart however you would like now and turn off the “camera control” layer.
For rotation you would have to include a negative sign to maintain the same rotation.
For position if you move the picture back in z space the amount of the camera focus distance, it will match up with where you started.
Scale is achieved by animating the z-postion of your parent layer, of the focus distance or z-position of the camera.
Once you do it once, you should be able to copy your expressions to your other compositions.
Johnny Cuevas, Editor
Thinkck.com