Those files shouldn't really be accessed unless the user is an admin. To fix the message logged in users see you can try finding in the file:
PHP Code:
$pagecontent = getsitecontent("index");
$article_title = $pagecontent[title];
$article_content = $pagecontent[content];
$article_content = nl2br($article_content);
Replace With:
PHP Code:
$article_title = "Your Title Here";
$article_content = "Your content or error message here.";
:)
Brandon