Create your own Everhood battles in the "ENGINE" Sprite. You should find all of the things you need where all of the comments are. Make your chart under "Define play chart" in the engine sprite. NOTE: For the dialogue system, some of the symbols haven't been added so you will have to add them your self. To do it, just create a new costume in the engine and then set the name of the costume to the symbol/letter you want. and then lastly, draw out the symbol/letter.
I swear every time I see a new custom battle from u guys, I feel more guilty for not implementing a good charting system aaaaaaaaaa