Purchase an MP3 player with a custom MP3 file!
Steps 2 make this work:
1. After buying item find "Miscellaneous" Forum
2. Post your MP3 file in "Profile Music"
3. Click on your attachment and copy the link of the audio player that pops up
4. Go 2 inventory, find Profile Music item and hit "configure"
5. Paste URL and enjoy : )
