Instructions
Plug in a supported external media device or MP3 player into one of the USB ports on the front of the console. The Xbox 360 accepts USB memory devices and external hard drives, Zune players and pre iPod Touch and iPhone iPods. Players with music stored on the Xbox hard drive may skip this step.
Insert the game disc and launch "Test Drive Unlimited."
Push the Xbox "Guide" button on the controller to open the "Dashboard."
Press the directional pad to open the "Media" tab.
Select "Music Library" and choose the source of the music files.
Highlight the desired track and click the "A" button to play the song. Push the "Guide" button to return to "Test Drive Unlimited."