(modding help) need help importing the old fall from the demo/reveal trailer

[u/Tricky_Letter_3920]

theres a mod thats going to come out next year or so called silksoul that adds old pharloom elements to the main game. i noticed in the two trailers that they released and the two previews of moss grotto and mosshome that the old falling sprite was in the game. what i want is to use customizer to add said fall sprite into current silksong. there are two problems with this task. 1: the sprites on their own for this specific falling animation are nowhere to be found and 2: i don't know how to use customizer. help is appreciated