Make Existing posts episodes?

Changed over this weekend from Joomla to WP. We imported all our content from the Joomla site; we’d had a dozen to twenty posts for podcasts in the joomla site.

Are we able to take those posts, and modify them to be episodes? I’d hate to have to copy every post into an episode post. Not to mention, it’d foul up the timeline of postings/podcasts.

Thanks!

http://wordpress.org/extend/plugins/seriously-simple-podcasting/