How do I make a face print?

[Merp]

I decided to make a couple faces for blockland,but I'm not sure how to make them an actual face print/addon for people to use.

Here are the faces that will be in addon
All of the faces are 256 x 256

[Ad Bot]

[TableSalt]

Just go off of what the default face pack does.
Put the 256x images on their own, then put 64x versions of them in a folder named "thumbs", then zip all of it up and name it Face_-----

[Merp]

Thanks