1. Double-click the "My Computer" icon from the Desktop.

2. Navigate to the folder which you would like to apply the background to.

3. Click the View menu and select "Customize This Folder..." from the menu that appears.

4. Check the "Choose a Background Picture" option.

5. Click Next.

6. Select a picture from the list, or if you have another image that you want to use, click the "Browse..." button and locate the image.

7. You can also change the icon caption colors if the default color doesn't show up well on the background image.

8. Click Next.

9. Click Finish.