page 54 of the user manual. I downloaded it here-
Loading Music FilesTo be played with Music Player, music must be stored on a microSD™ MemoryCard, in a folder named My_Music. The My_Music folder is created for you whenyou install the microSD™ Memory Card into your phone.► Copy music files to the microSD™ Memory Card using your personal computer.
My Ringtones My Ringtones lets you assign ringtones for calls, alarms, and other alerts.► In standby mode, press Menu ➔ Multimedia ➔ My Ringtones.
My Sounds My Sounds lets you record and manage voice memo files and assign melodies asringers or alerts.► In standby mode, press the Menu ➔ Multimedia ➔ My Sounds