Hasta La Motion!

Hi there guys, I am doing a matte painting/camera projection vfx shot that I am thinking of involving a vertical crane shot down to street level from the rooftop. I am able to get about 7 pictures from the multi-story carpark opposite that I snap the shot at every level. Is there way to stitch this together? I tried using photoshop stitching tool and the canon’s photostitch and it doesnt seem to work and its all distorted. Probably because I am using a 17mm for my shots and the perspective is all shrewed? And is there any great stitching programs you guys recommend? I am thinking of trying to do 3 horizontal shots at 50mm at every level and then stitch them all up together. Any tips for advice so that I can go down again to shoot this to be able to get a good stitched image?