to set the wallpaper in folder background

to set the wallpaper in folder background just try

show the hidden files and find the file "desktop.ini"

then Iconare_image="give the image path"

or make a text file and paste the given code
[ExtShellFolderViews]
{BE098140-A513-11D0-A3A4-00C04FD706EC}={BE098140-A

513-11D0-A3A4-00C04FD706EC}
[{BE098140-A513-11D0-A3A4-00C04FD706EC}]
IconArea_Image="path of image"

and save this as "desktop.ini" and refresh ..........................