Adding items to the Send To context menu
Right-drag the application icon or application shortcut icon from the start menu to your desktop and choose "Create shortcut here" from the menu that displays when you release the right mouse button. Rename the shortcut as appropriate.
In Vista, paste the following into a Windows Explorer addressbar:
%APPDATA%\Microsoft\Windows\SendTo
Move the shortcut you recreated to the SendTo folder you just opened up.