Enable content pack creation in Salesforce.

A content pack is a collection of related documents or files that are stored as a group in Salesforce CRM Content. For example, you may want to create a content pack with a product list, price quote, and contract to send to a particular customer. Any file in Salesforce CRM Content can be added to a content pack, from traditional business documents such as Microsoft® PowerPoint presentations and Adobe® PDF files, to audio files, video files, and Google docs. Using email or instant messaging, you can distribute the content pack to colleagues in your organization or leads and contacts outside your organization. The recipient of a content delivery can click a single URL to open a preview player with which he or she can preview and download the content. You can then view tracking information to see how often the content pack was viewed and which documents were downloaded. . 

Please refer to the link for steps to create content Pack.

https://help.salesforce.com/HTViewHelpDoc?id=content_docpack_create.htm&language=en_US