Higan Installation Final Notes
The following is copied from the README's "Higan Post-Install" section. These steps must be followed in order to play the hack on Higan:
Fortunately, as of Higan v096/v097 and later, installation on Higan, while still not one-step, has become simpler.
First, make sure the directory contains a file named program.rom, a file named msu1.rom, and a number of tracks named track-#.pcm where # is a number.
Then, you must go to %USERPROFILE%\Emulation\Super Famicom (create Emulation and Super Famicom if they don't exist) and create a directory called ff3msu.sfc.
Finally, you must move the contents of the destination directory to the %USERPROFILE%\Emulation\Super Famicom\ff3msu.sfc directory. If you succeeded, this directory should have the following files in it:
program.rom
msu1.rom
and a number of .pcm files named track-##.pcm where ## is one or two numbers.
It might also have a save.ram file. It should *not* have an ff3msu.sfc file or any other .sfc file in it, nor should it have a manifest.bml in it.
You can then load the game in Higan again as normal. You should now be hearing improved music through the MSU-1!