Have you already downloaded the Windows Phone 7 theme for Windows 7? If you only want the Windows Phone 7 icons, here’s a free icon package released by the Windows Phone developers.
The icons included in the icon package are all .png files. If you want to install the icons in Windows 7, you have to convert them to .ico files. A handy site to do that is convertico.com!
Need some inspiration what else you could use the icons for? How about adding them to your Windows 7 dock bar? I’m sure you’ll find some use for them!
And don’t forget to download the Windows Phone 7 theme, it rocks (link above):