Some have tried doing that before, but to no avail. The truth is there's no simple fold structure that'd be enough to make the game "understand" the what you're trying to do is add custom textures for staffers (it used to work the same way as idols during the early alpha/beta days, but the way those files are handled by the game has changed since). I haven't heard of a single person who's managed to achieve that what you're attempting to do (let alone adding a random pool of accessories and hairstyles to the staffers), but I'd definitely be interested in it if someone managed to pull it off.