This hack will make the fnews plugin automatically cut the news post at a certain number of characters if there is no tag present in the post.

Open up fnews.php and find

Code:
if ($readmore>0){
$row['fp_text'] = substr($row['fp_text'], 0, $readmore)."<a href=\"forums.php?m=posts&amp;q=".$row['ft_id']."\" class=\"readmore\">Read more...</a>";
}


Add the following immediatelly afterwards:

Code:
else { $row['fp_text'] = substr($row['fp_text'], 0, 300)."... (<a href=\"forums.php?m=posts&amp;q=".$row['ft_id']."\" class=\"readmore\">Click To Read More</a>)";}


Change the number "300" to the number of characters you would like it to end at and "Click To Read More" to your own custom text.