Thunder

This add-in enables you to embed a Creative Commons license into a document that you create using the popular applications: Microsoft Office Word, Microsoft Office PowerPoint, or Microsoft Office Excel. With a Creative Commons license, authors can express their intentions regarding how their works may be used by others.
The add-in downloads the Creative Commons license you designate from the Creative Commons Web site and inserts it directly into your creative work. Creative Commons supports a number of languages.

Download it from here.