You’re basically asking for the implementation of some core FE4 features, in which case I would advise you to follow SqRtOfPi’s FEIV remake project. He’s going to make his work open-sourced at some point in the future.
There won’t be tutorials on doing this exact thing, because it hasn’t been done yet. Based on the types of questions you’ve been asking, you may want to try picking up ASM hacking.