How do I convert these "zip" files into something I can listen to?

All of our MP3 products are downloaded in the Zip file format, a file compression and archiving format which enables us to send audio material and accompanying printed material in a single package. Windows XP, Vista, and Mac OS X have unzipping utilities already installed. If you're using Windows 2000 or Mac OS 9, information is available here about obtaining the software you need. For all of our MP3 products, we make available a pdf document from which you may print CD labels. For most of our MP3 products (including the Journal), we also make templates to print up jewel case tray liners. To order sheets of labels, see here. To order tray liners, see here.