The great Niar_Himself would like to know if there's any way to have 3D character at Hanenbow (because he replaced it with something better, because this stage sucks).
PSAs don't work like that, you can't simply rename all mario.pacs to luigi.pac and expact Mario to spawn there, each hack is made over a specific character.
However to truly import a character over another one you will need module files named ".rel"s