It’s not exactly clear what you are looking for when you say “those thumbnails”. For starters you might want to research, and learn how to use, the Preset Editor in Photolab. Just be careful you don’t inadvertently delete existing presets.
If you are looking for FilmPack partial presets I created them recently for all film types. Here is the link to that thread.
if you are looking for a tutorial on how to create full and partial presets that’s a different issue. I may not be able to address helping you on that right now since I don’t have the time to write up a meaningful and easy-to-follow tutorial. Maybe somebody else can assist you right now with easy to follow instruction they previously put together.
Mark