How can I download the wallpaper picture from my BB Torch?

My BB Torch wallpaper picture was transferred from the BB�s pictures. Unfortunately, the original picture is now corrupted and I would very much like to download the wallpaper version before I must exchange my BB Torch for a newer model at the end of February.
The picture is of great deal of sentimental value to my wife and me and I would really hate to lose it.
Thank you,
Gregory

I don't think there's a way to do that :(
You could take a screenshot and maybe reconstruct it with photoshop, but it will stay low resolution.