Backgrounder

This program adds background images to folders

Backgrounder adds background images to Windows folders. Additionally,
you have the possibility to choose the color of the file captions in the
Windows explorer.

The new version features the option ?Process subfolders?: If you check
it, then, your background image will be added to all the subfolders (or
a selection) as well.

Of course, there is a possibility to remove all the images!

http://www.clickomania.ch/progs/Backgrounder.htm