Managed to get PS1 games running on my PSP, but music doesn't work. The PS1 games are a bunch of BIN files that I converted into a single BIN and then used
Guide: PSP and PS1 games on the PS Vita (Adrenaline) - YouTube
Thanks to the PS1 emulation on the PSP, I recently revisited one of my first video games (Toy Story Racer) : r/PSP
How To Convert PS1 ISOs To Play On PSP - YouTube
How to Play PS1 Games on PSP CFW or PS Vita Adrenaline with PSX2PSP | PS1 EBOOT Conversion - YouTube
PlayStation Portable - Wikipedia
PS Plus guide: all PS1 and PSP games with trophy support (August 2023)
PlayStation 1 Intro gameboot for PSP | Kippykip Forums!