upload you wallpaper image / music file* into your album. You can create a hidden album for it.
*trial account and 3G/unlimited users can upload mid format music
50MB/500MB/1000MB can upload mid, mp3, wmv music format file.*
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| View the full image, copy the image URL under the image.
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| paste the URL into your album properties' "background image" / "background music" field and save the change.*
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