Figure out which file represents the background. Probably found in C:\Windows\Web\Wallpaper . Open it in an image editing program. Crop in the photo you want to use. (The method will vary depending on the program you use.) Save it with a different name so that you retain the original unchanged. Change the wallpaper to the one you just created and done.   If you can't figure it out try joining the forum @ [URL] In the Customization forum there is a sticky thread at the top called "Custom Windows 7 Wallpapers." If you post and are prepared to upload both images someone there will make it for you. If you're not using Windows 7 just don't mention it. Wallpapers are no different in 7 than XP or Vista.
I use, and love, the Dell Background.I use the black one because of it's satiny look. However, since it is a background itself, I can't use a centered photo on top of it. Or can I? I've tried to research this to no avail so I'm hoping someone here can tell me if I'm wasting my time trying to add the photo. Thank you for any help I can get. :)
Dell Desktop Background-- add photo?