I have seen this hacker's work before, one time on a seo contest page. kenlist.com Beware your optimize site might be next!!!
everything is up and running fine behind that homepage. ex: kenlist.com/top-links.html I'm willing to bet its an unsecured hosting issue that allowed it. The script is esyndicat.
Anything that uses the index.php will be affected, since that's what was replaced. Everything else will be ok. yes and no