People who use this module or the free one should note that they are supporting him and his website if they do not remove some of the code. His install code is putting links back to his site in the comments of people's websites which is being picked up by google as links to his website. We all know what that will do for his site for SEO rankings and will do to poor people who become victim because they do not know of this thread.
You will find something similar to this in your source of your site:
<!-- URLs Rewritten by XCSEO Pro v1.1.5 - created by PHP Site Solutions -
http://www.phpsitesolutions.com -->
I've also seen some things that appears to be intentionally malicious stuff to other people's sites to self promote his.
Carrie