Most modern mods come with a _psych folder. Simply drag your mod folder into the mods directory of the engine. Launch the game, go to "Mods," and turn your mod on.
Have a script you think deserves the crown? Drop the link in the comments below. basically fnf script best
Go to your FNF folder (usually C:\Program Files\FridayNightFunkin ) and copy the folder somewhere safe. Most modern mods come with a _psych folder