What you can do, is set up your joomla website with JBS. Then, use the BibleStudy import component to import all your files into the database. Once you have all of your studies imported, you can use the podcast plugin to create the podcast for your studies.
I'm not sure how podcasts work, but can't you just swap the feeds once the JBS podcast is up and running?
I've just put in the download section a new version of the Import component, which has more control over the Id3Tags, you can try it out
joomlabiblestudy.org/invisible-downloads...ory/3-component.html