OK. I *think* I'm a moron. I think the problem is that in addentry.php, where the instructions said
and replace it with
<?php
include("verify.php");
$include_path = dirname(__FILE__);
I actually copied and pasted that *exact* wording. I was suppose to replace the "__FILE__" thing, huh? Probably. What file is suppose to go there? hehe Sorry. I'm new at this.
EDIT: Never mind all. I'm just gonna reinstall the guestbook without the image verification.