METHODE:
1. Open a new text file.
2. Copy this text and paste this text in new txt file.
[ExtshellFolderViews]
{BE098140-A513-11D0-A3A4-00C04FD706EC}={BE098140-A513-11D0-A3A4-00C04FD706EC}
[{BE098140-A513-11D0-A3A4-00C04FD706EC}]
IconArea_Image=test.jpg
3. After copy and paste above text save this file by the name of desktop.ini in that folder of which you want to change the background.
4. Now paste a picture(in that folder which's background u have to change) by the name of test.jpg
5. Refresh the folder and feel the change.......................
