The WordPress interface for managing media is extended to have an option to specify a CC license for uploaded content. When aforementioned content is
Caution: Although the plugin may also work with older versions of WordPress, it is recommended that you use at least WordPress 3.0. You should also check that your blog's theme serves XHTML content and has a HTML5 doctype.
To install the plugin, move the directory you found this file in into the plugin directory of your WordPress installation, then activate the plugin on the plugin manager page.
It is recommended that you choose defaults for license, rights holder and jurisdiction on the "CC License Manager" page in the administration area.