X and Fluxbox :: install wallpaper ( my jpg image)

I am a newbie. Please help. i've installed dsl to hdd. I saved an image to the hdd & would like to use it as wallpaper. I haven't been able to find a way to do this in the documentation. Have I missed it? Will someone please give me some help? Again, I am very new, so do not worry about making things too simple. I doubt if you can anyway.
Thank You

If you want it to be in the wallpaper list, copy it to the "official" wallpaper location, /home/dsl/.fluxbox/wallpapers, I think.

Or you could just use the same program the wallpaper tool uses to put it on..

(Off-topic)
Interesting wallpapers: http://commons.wikimedia.org/wiki/Category:HDR_images

thanks to curaga. I got the wallpaper installed just fine. Thanks also to stupid_idiot for the info about where to get other wallpapers.

original here.