This allows you to use the built-in secondary sidebar as an alternate on one sidebar themes (you’ll want to register a separate sidebar if you are using two sidebars in your theme layouts). This has a limited scope, I would recommend a plugin like Display Widgets if you are going to have a more complicated page-by-page application.
Source: https://gist.github.com/joshuadavidnelson/7549996
Tags: Genesis, Page Template, Sidebar