I've made a few titles in all their glorious BGM that work under NEO4GDEMU.
Metal Slug for NEO4GDEMU.7z (517.8MB)
https://mega.nz/file/ZVAkFTYS#QT0vZmpto ... ffKfSqUKX8
Metal Slug 2 for NEO4GDEMU.7z (378.3MB)
https://mega.nz/file/lQ5S2b7a#Axgm5Qy-A ... RLVNq1CWrU
King of Fighters '98 for NEO4GDEMU.7z (512.2MB)
https://mega.nz/file/NEBnhAhQ#iOukZbSX8 ... JHIjHT438c
Last Hope for NEO4GDEMU.7z (160.4MB)
https://mega.nz/file/ddBSxTLK#YoBLK88H1 ... p53CF4lm1A
Neo Turf Masters for NEO4GDEMU.7z (280.6MB)
https://mega.nz/file/AIoxQYjQ#WpFhVcG3c ... EF-3cB169o
Bust-a-Move for NEO4GDEMU.7z (1.3MB)
https://mega.nz/file/NVh1HYpA#Mogen5Xpz ... 2PVUQmWVXk
If you have made any titles that work, let me know.
Summary:
-Working Titles:
Metal Slug
Metal Slug 2
King of Fighters '98
Last Hope
Neo Turf Masters
Bust-a-Move
-NON-Working Titles:
2020 Super Baseball
Aero Fighters 3
Art of Fighting
Baseball Stars 2
Bang Bang Busters
Fatal Fury - The Battle of Fury
King of Fighters '94
League Bowling
Super Sidekicks
Viewpoint
I've yet to see a working title that has "MACTOPIX" in the .IMG file. MACTOPIX is the pre-mastering software. "NON-Working" means it does not show up when 'Select Game' is clicked from NEO4GDEMU.