Get the latest version of Scherzo.
Install in the normal way, i.e. extract the scherzo.zip file and upload it to your themes folder. Login to your dashboard and select the theme from the Appearance menu.
Scherzo will scale to fit any screen width. This means you can view the theme on mobile devices without installing any plugins. To see how it works either view the live demo on a mobile phone or shrink your browser window.