fl0PPsy’s own port of PSGroove with Hermes v4b for Rockbox devices — a whole lot of ‘em. You’ll need Rockbox installed prior to hacking your PS3, so do that here first. Well actually, maybe you should first see if your device is compatible or not.

iPod 4G Greyscale
iPod 4G Photo
Gigabeat S
Gogear hdd 1630-1830
Gogear hdd 6330
Gogear hdd 9200
iRiver H10
iRiver H10 5G
iPod mini 1g
iPod mini 2g
M-Robe 100
Sansa e200
Sansa c200v1
iPod nano 1g
iPod Video 5G
Vibe 500

Download: PSGroove Rockbox Hermes v4b

Source: ps3-hacks.com