Step 1: Creating the Shortcut on the Desktop
Right click and select send to>desktop (create shortcut).
Step 2: Assigning the Keyboard Shortcut
Step 3: Making the Shortcut Invisible
Right click anywhere on the desktop and select the "view" menu. Un-check the option "Align to Grid" (if it's un-checked, leave it). Drag the icon to any of the edges of your screen until you can't see any of the text/image. Mine's in the top right so I won't accidentally click it.
You're done! Use it wisely, it can be a powerful tool!