I wanted to know if there was a way to make my psp music files under separted artist after the Genre

I wanted it to go something like this...

-SYSTEM
-PHOTO
-MUSIC
-R&B
-(artists)
-(Song by artist)
-Rock
-Heavy Metal
-Classical
-VIDEO
-GAME
-NETWORK



But when I do make the folders... it doesn't work on my psp.. it only shows the songs after 1 folder...??? Anyone know a way to organize that..? Please let me know...