Just tried to ge Super Maio Kart with MSU to work but without success.https://www.romhacking.net/hacks/3656/
While I had no problems to get Super Metroid or Zelda LTTP to use MSU-1 (thanks to proper .ips files!) the SMK MSU1 project only delivers some weird files that are supposed to work together with SNes9X (1.56.2) - but when loading the renamed ROM (unheadered!) while having all necessary files in the same directory, the ROM is just using the original music.
Is there a chance that there is a proper IPS file to be applied with LunarMagic and then adding the necessary PCM files to the ROM directory along with a valid XML file?