RSS Feed Addition/Removal

Hello All,

I recently re-vamped my wife and I's podcast website using Drupal(of course!). The "blog" site that our MP3 host Libsyn provides was just way too basic. Everything went into the same RSS feed so any "blog" posts ended up in the podcast feed as well. The site address is http://www.lifeonfire.org .

I thought that I would do things the "easy" way by continuing to use the Libsyn blog to do the podcast posts and then have Drupal pick up my feed from feedburner. However, what I found was that Feed API doesn't pull the MP3 enclosures down, and because the podcast posts from Libsyn don't handle the break tag correctly, all of the content of the posts get jumbled together.

So I went through, got the RSS Enclosure module and went to every post adding the MP3 enclosure information and fixing the content. Then, Tanya and I put out a new episode. I updated the feed and it killed ALL of my changes. All of the enclosures and re-formatting that I did were gone!

At this point, here is what I am looking to accomplish.

1. Pull all of the feed items from the RSS feed with enclosures date information, and content and save them to my site.
2. Create a new feed containing the old items and any new podcast episodes, but, have it set up so it isn't redundant and creating double posts when I post the new episodes.
3. Update my feedburner feed to pull the items from this new site feed, that will contain old and new episodes.

Any ideas on how to best accomplish this?