If you are talking the file included in the main post - Chalkdust_Generator.zip - you just install the files into your generator directory. You can find the generator folder inside of your main install directory, like \RPG Maker MV\. The files are already put in the appropriate directory structure. You select the new 'skins' by changing the facial mark inside the generator.
Hey, so there's the harpies/succubi sheet, and it looks fantastic! Does anyone know if there is a way to get SV Battlers for these? I'm specifically looking for the 'angelic' looking one and the one directly below it. Thanks!