Go to your FNF folder (usually C:\Program Files\FridayNightFunkin ) and copy the folder somewhere safe.
: FNF provides various callbacks (functions that are called at specific points in the game) that you can use to insert your mod's functionality seamlessly into the game. basically fnf script best
Go to the official GitHub page for "Psych Engine" (do not trust third-party reuploads). Download the latest .zip or .exe release. basically fnf script best