to use a player pack simply COPY and PASTE the files into the main skin folder.

if you want to revert the assets to the original simply COPY and PASTE the !RESET gameplay folder's assets into the main skin folder.

whenever switching between different player presets make sure to reset the skins assets by COPYING  and PASTING the files in the !RESET folder
into the main folder otherwise different player presets assets may become mixed in the main folder.