I take no credit for this app, I've just corrected some of mrafenne's coding errors that occured in his lua files.

INSTALLATION
1) Simply place the vmp3v1 folder in ms0:/PSP/GAME folder and launch it from the xmb.

CAUTION
You cannot place this in a subfolder in GAME folder, it will not load correctly(that's just the way lua is).

CONTROLS
(while file searching)
-press dialog up/down to toggle through files
-press X to select folder/song
-press O to come out of the folder
(after selecting a MP3 file, it will prompt you to choose a visualizer)
-press either dialog left/right to toggle through visualizers
-once you've selected your visualizer, by pressing X, it will display your visualizer
(while viewing the visualizer/listening to music)
-press Ltrigger/Rtrigger to toggle through songs
-press dialog left/right to toggle through the visualizers.
-press triangle to bring you back to the visualizer selection menu
-press X to pause/play your music
-press O to display music infomation,
press square to vanish the music information
-press start to bring you back to the music selection

KNOWN BUGS
-while listening to the music, if you press triangle to choose a new song, it while not bother changing(will continue to play the current song).
-there is no continuous playback.

AGAIN, I DONT TAKE ANY CREDIT, I JUST FIXED SOME OF HIS LUA CODING.