Download the Jacksum File Browser Integration for Windows and execute the installer that is contained in that package. The installer will install the most used features of Jacksum for the Windows Explorer. Also any other file manager that use the Microsoft SendTo Standard API will benefit from this feature such as the Explorer++ (GPL), the FreeCommander (Freeware) or the Multi Commander (Freeware).
During the installation also an uninstaller is created which can be used to remove the feature again. Both the installer and uninstaller doesn't touch the registry.