Split Screen 3 photos with Ken Burns effect

Hey guys, 

For an intro shot, I want to have 3 pictures in one frame while i add movement to them using Ken Burns effect to make it more exciting, and not boring. I am not sure how to do this.

Once I croop the photos and try to add movement by using the motion effect, it just moves the whole image around the screen? I need to, in a sense, lock the image into place, so I can move/zoom/slide the image around, while it is still in its place.

I'm wanting to have 1 image take up the top 50% of the screen, and have 2 images take up the bottom 50% of the screen. 25% each, one left and one right if that makes sense.

Thank you!