Abigail Ghost mod help

[JeffTheDuck]

I'm working with a friend to create a character mod that uses the Abigail ghost however they're struggling to pull the code for it. I was wondering if there's actually a way to do this because our idea was to take the base code and expand on it. I also need help finding the Abi sprites as I need to edit them and replace them with my own. Any help is appreciated as this is my first time dealing with any kinda of code and my friends first time working with DST.