Actually, I was thinking that once you got all of the pictures aligned perfectly, you would nest them in a new sequence and apply the green screen all at once. But that would not take the shaky, organic feel into account. To get that, you would probably have to use an After Effects equation of some sort.
So, yes, it is probably better to use prints and approximately line them up one frame at a time. I will have to try it my way one of these days just to see how it turns out though.
Here is a question for you though, or for others.... How many frames does each image last? In the video in post number 5 which used 15 frames per second, the answer is three images for for each person and all three shots have new video frames. So, each image lasts one frame.
In the video from post number 6, which uses 24 frames per second, each image lasts two frames.
I guess what I want to know is how you plan these things? Trial and Error or is there a set of general rules to follow that will accomplish a predefined goal?