Converting tokens into portraits from a .mod

So I've got Nord's Skulduggery for 5e (great resource btw), and I'm trying to convert some of the NPCs over to PCs for some one-shots. How do I locate and then convert the tokens created for the NPCs and turn them into portraits as well? Or is that just something I can't do since they were saved as tokens only in the mod file?

I doubt that you will be able to do that if the module is encrypted.

Take screenshots with the portraits on your screen and use Token Tool to make them into portraits or tokens.