Things You'll Need
Instructions
Complete all the missions in Challenge Block A with a bronze score or better. Challenge Block A tests your braking skills on different types of tracks. Custom soundtracks unlock once you complete the last challenge.
Connect the PSP console to your computer with a USB cable.
Press "Windows-E" to open the Computer window. Double-click the PSP icon, listed under Devices with Removable Storage.
Locate the MUSIC folder on your PSP. If you don't have this folder, right-click in the right window and select "New Folder." Name the folder "MUSIC."
Copy MP3s into the MUSIC folder in the order you want the songs to play. Disconnect the PSP from your computer.
Start "Gran Turismo" and select "Options."
Select "Audio Settings" and "Set User BGM."
Select the "MUSIC" folder, and then select "Save."
Start any race to hear your custom soundtrack.