1) I scanned the animationtoolkit mouth sheet into the computer and loaded it as a layer in Anime Studio (the shapes on the left are the scanned ones)
2) In Anime Studio I made a mouth rig based on the scanned shapes. It’s basically using layers and a mask. There are 4 layers: upper teeth, lower teeth, tongue, and mouth. Once the rig is made I can then move the points around and make any shape I want. In the picture each mouth is a full version of the mouth rig. You can see in the layers listed at the bottom right, they are just duplicates. I duplicated them so when I render out the jpg frame and print I will have a few copies to cut out. I printed on regular inkjet sticker paper. In the future I may make my own full set of mouths from scratch using this technique.
Here is a pic of the shapes being used to animate a scene:
I made a simple video that shows a bit better on how I accomplished it: