using ci library other project license

[eluser]Unknown[/eluser]
hi,

i am not altogether sure how to include the ci license terms if i use one of the system libraries in another project,

i have another project, and i want to use the ci email class with it, it means going through it and adapting references to other ci variables, and one or 2 minor changes (e.g i want to change where the extension-to-mime lookup is called from)

what text content should i place at the top of this file to notify users of the ci license, is it enough to say
something along the lines of....

/**
* Adapted from the original CodeIgniter Email Class
*
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright © 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @LinK http://codeigniter.com
* @since Version 1.0
* @filesource
*/


i really want to know the proper etiquette for this type of thing, for future situations as well