Wallpaper For Each Screen?

[Gizoku]

Hi, I did a search for this and nothing came up so I'm sorry if this has been covered before.

I'm looking for a way to get different wallpapers on each screen of the E90. Obviously the aspect ratio for each screen is different and I've found a wallpaper for the inner screen, but it becomes bordered on the outer screen, so I'm just looking for a way to assign a different wallpaper to the outside screen.

Does anyone know of a way of doing this?

Thanks