IEmage offers a way to change your Toolbar Image locally. With IEmage you just can display every BMP or JPG image independent of its size as a Background Image This Picture will be visible in the Toolbar of the Explorer as well as in Outlook Express! You can even create a new image with IEmage. Just take a personal picture, resize it, use some filter functions and choose a suitable tiled, massive or gradient background.

Screenshot of IEmage