

There is one other step: downloading a file called scph5501.bin that you can find by searching that filename. It’s the bios file for the playstation and the emulators can’t include it because of laws but it’s pretty easy to find yourself.
You can get the games from a torrent site or by searching “ps1 iso nameOfGame”
A little bit of searching found me mp3splt-gtk, which boasts the ability to automatically split an mp3 file into tracks, and even name them according to internet or local databases. I haven’t used it but it sounds like exactly what you need.