That's an easy one.
To create a link to an EZ page, you just proceed as if it were any ol' page.
Go to that page and look at the address bar in your browser:
http://www.example.com/index.php?mai...=1&zenid=bogus
You leave out everything before index.php? and the zenid, so your link looks like this:
<a href="index.php?main_page=page&id=2&chapter=1">blah</a>