The following hack will enable you to add some custom items to the desktop context menu.

Open regedit.exe and browse the following registry key.

HKEY_CLASSES_ROOT\Directory\Background\shell

We will consider adding controlpanel shortcut the desktop context menu.

Create a new Key called ‘Control Panel’ under the shell key.

under that create a new key called ‘Command’

Select the command key on the left side and then set the Default value on the right side panel to the following value.

rundll32.exe shell32.dll,Control_RunDLL

After this you can immediately see the new item in the desktop context menu.

To remove simple delete the control panel key.