Control click and save the image. Open in Paint, and add text for your box titles. Save it after you finish adding your box titles. Then control click on the saved image, and choose 'set as desktop background'. Easy, peasy.
The categories/box titles I tend to use are: Photos, Projects, Important, Family, To-Do, ASAP
Helps keep me on task, and I can easily move the folder or doc to the next square if needed. Enjoy!
PS ~ Let me know if you have a specific layout you would like to see.