I use Firefox and have its download manager set to always ask where to download files, so when I go
here and select a gadget, it then opens a detailed page for that gadget. On the detail page, click the download button and save to a folder of your choice (I use something like D:\Username\Documents\Saved\Computers\Windows Seven\Icons and Themes\Gadgets). Then open that folder and double-click the gadget to install. (must have gadgets on beforehand - right click on the desktop and select gadgets.)