My site has duplicate php files, ie: index.html and duplicate index.php.htm, will this hurt me with duplicate content, as files are both the same. Not sure if I even need the php duplicate but I didn't create the site, so not sure. www.napoleon.cc thanks Fix
Well, as long as search engines can't crawl your duplicate files, you are fine. I would recommend deleting them and only use the correct files that you need.
Can't you name it as .php instead? If you want to have .htm extension behind, look around the net how to parse php to htm extension without affecting your PHP code.