Hallo,

I copied the files in htdocs/admin and htdocs/includes.
I changed the html_output.php and copied in the directory:
/htdocs/includes/functions/

The shop works, but without SEO URLS and:

I can't find the Seo Urls configuration from within your Zen Cart Administration Interface. Located inside of the Configuration drop-down menu, there will be an entry titled similar to Seo Urls 3.x.x.

What is wrong?
Thanks.