Here is a simple trick to set background image to your hard drive or Pendrive.
Follow the steps as it is -
1. Open Notepad copy & paste the following code to the Notepad.
2. Save this as 'desktop.ini' without quotes in that drive whoes background you want to change.
3. Now paste an jpeg image to that drive and rename it as 'MyPic.jpg'.
4. Close the Explorer and then reopen it.
Now go to your Drive and see how nice it look.
You can rename the image as you will. Here in this code the image name is 'MyPic.jpg'.
The image name in desktop.ini file should same as of image name.
Both files 'desktop.ini' and 'MyPic.jpg' should kept in same drive.
This Trick can only work in Windows XP.