you can have a bunch of packs at once, and basically just start the game, have it open the location folder (you can do that by trying to change your slave's portrait in game) and then just dumping them into the folder that it opens updoes anyone know which art pack is the best? and how to install lol
by the way, if you combine the packs you'll find that the game might shit itself a little while when changing a portrait, that is normal
i personally find the black and white pack to be the best quality (and if you want portraits of males in addition to females)
you can also crop and name your own images and add them to the folder if you want as well