..."This allows you to listen to mp3s ANYWHERE in the XMB!
Currently supports up to 100 songs in the ms0:/PSP/MUSIC/ folder!
Controls -
LTRIGG + LEFT = Switch song(to the left)
LTRIGG + RIGHT = Switch song(to the right)
LTRIGG + SQUARE = Stop current MP3
LTRIGG + CROSS = Pause/Unpause
Known Bugs -
- Make sure to stop your current song before loading up a homebrew or UMD, else crashes.
- When exiting out of USB mode, music may mess up. Just switch the current song to fix that.
Place the mp3XMB folder(and all its contents) in the ROOT (ms0:/(here)). This is very important! It MUST be in the root. Then, just simply point the P.O.C. Custom Firmware to load the RUNMEmp3.prx. ex) loadmodule0 = "ms0:/mp3XMB/RUNMEmp3.prx"."
Download and give comments thank you

NOTE :- I have tried this however I could not get it to work. I hope somebody else manages to get it to work anyway.
As this is only a plugin it should not harm your PSP however there is always a chance of BRICKING your PSP as this is still part of the Flash.
Attachment 7975