Famicom Music (Purist):
https://drive.google.com/file/d/1ZaI_FCWcUgPNNZYrApO7cPfvNU4qtepx/view

*Purist version contains no additional tracks. Only those released in the official original Famicom version.

Famicom Music (Enhanced):
https://drive.google.com/file/d/1-jrRY9TeRYuHxgAXbZMkE85F40u0t6yI/view

*Enhanced version includes an officially unreleased boss theme for FF2. It is substituted in for Battle Theme A and B, rather than the original Battle Theme 1.

Origins PS1 Music:
https://drive.google.com/file/d/1gVfRyUqFpOF2JLbBVJpYgu6nsjOWHpoA/view

In the root of your FFII PR directory, make sure you overwrite with the included custom UnityPlayer.dll, if you don't already have it. It's required for almost any mod.

Then simply overwrite with the included .bundle file in the indicated location as per the included file structure.

That it! Load up the game and enjoy.