how did you get the mod and modified it even though the mod isnt for mac and im pretty sure your a mac user from your most recent message
this port is like really shitty but what i really did was like replace the original characters with the spritesheets from the mods, i had to change the xml so the animation code matched with the original xml, like "DAD Sing LEFT" or smth like that. The chart thing was pretty easy, i replaced the original songs with the charts from the mod and edited the json file so instead of, "song: Ron", i chnanged it to "song: Bopeebo". the code in the json probably looked like that, i dont remember lol. but uhh yeah, i replaced the backgrounds aswell which was pretty easy and thats basically it. my newer mac ports are basically just stolen psych engine ports, except for the tails.exe port, that was done with the source code.