How to.
Open up explorer then go to appdata/local/introversion/name-in-game.txt
then open name-in-game.txt with notepad++.
then copy one of the prisoners.
then paste below last one.
edit as you like.
then go into the game and then press extras then name in game.
WARNING: if it says update available don’t update it will overwrite your prisoner/prisoners.
PS: Make a Backup of name-in-game.txt.