PHPCrawl and CodeIgniter

[eluser]Unknown[/eluser]
Hi Guys,
I've been playing around with codeigniter for a while and wanted to find out how to use PHPCrawl (http://phpcrawl.cuab.de/)classes in CodeIgniter? I know it will go to the libraries folder but I just don't know how to call it and override one of the methods.

Thanks in advance!