I have a semi complete Powerpoint presentation, there is 1 photo on each slide with several custom animation effects. Is there a way to replace that photo with another without losing the custom animation? as far as i could see there was no way to redirect the picture.

Also, is there a way to set preference between photos when it comes to overlapping? i want picture A to go over the top of picture B, but its doing the opposite.

any help would be greatly appreciated
thanks