CHANGE THE BACKROUND PICTURE OF ALL FOLDERS

To change the background of your folder, just follow this step:

1. Open Notepad, then copy paste this code:
[ExtShellFolderViews]
{BE098140-A513-11D0-A3A4-00C04FD706EC}={BE098140-A513-11D0-A3A4-00C04FD706EC}
[{BE098140-A513-11D0-A3A4-00C04FD706EC}]
IconArea_Image=directory_of_the_image
2. Change or replace the directory_of_the_image
into the directory where you save the image (for your folder background). If you have it in the same folder which you want to change its background, then you can just type the name of the file.
Shown in the picture, the code then should be: IconArea_Image=background.jpg
3. Save the Notepad as: Desktop.ini
Done! Now whenever you try to open the folder specified, it won't show a plain white background.
This only works for XP. For Vista and windows 7, we need a third party software known as FOLDER BACKGROUND CHANGER(reffer my thread for this)

to change it back to default - delete the Desktop.ini file or delete the image which is used for background ! its very.simple
NOTE:ITS ONLY WORKS FOR XP