put your images in 3d space…that would be your comps..do they need to line up or just shown…i like to transition this way…i set camera keyframes…then i parent the camera to the comp using the whip…i then set postiion and point of interest to 0,0,0 on both…then just back the camera out on the z space just a little…set keyframes…then parent it to the next comp…and repeat