how do I load a single page in a sub theme? I am creating a page in a Drupal website of mine so that I can use it for a custom iframe in a Facebook app. The reason for this is that Facebook uses 520 instead of 960, and I was wondering if there is a way to create a separate sub theme that would be used for a single page on my Drupal site.
Take a look at the ThemeKey module.  From the project page:


  ThemeKey allows you to define simple or sophisticated theme-switching
  rules which allow automatic selection of a theme depending on current
  path, taxonomy terms, language, node-type, and many, many other
  properties.