This mod will replace Joys head model with Ada Wong from the Resident Evil series, yes it also replaces Joys mask on and off states.

Installation notes: Put the mod folder from the archive to your mod_overrides folder.
Example Path: PAYDAY 2\assets\mod_overrides (if you don't have mod_overrides folder, please make one in the assets directory.)

Otherise, refer to the Dependencies & Instructions tab. In case you get stuck, please read the following guide below on how to install such mods.
https://wiki.modworkshop.net/books/installing-payday-2-mods/page/installing-mod-override-mods

Enjoy!