To add to Windows Vista
-Extract JackassCalculator.gadget
-Put .gadget folder in '\Windows Sidebar\Gadgets\'
-Add JackassCalculator .gadget

To add to Windows 7
-Extract JackassCalculator.gadget
-Click on Start
-Type 'shell:gadgets'
-Add .gadget folder to new folder
-Type 'Desktop Gadgets'
-Click on 'Jackass Calculator' to add Gadget to your desktop