There is no built-in ability to do this in Publisher. That article:
http://office.microsoft.com/en-us/publisher/HA011587451033.aspx
describes two ways, that aren't that hard once you actually play with the
methods. I found it easier to use the html method at first, but eventually
found the ECMAScript code approach more versatile, as I could insert that
hyperlink into a normal text box with other text.

And if you choose to use the ECMAScript code approach note that the first
javascript code snippet is incorrect on the website. Use this instead:

<script language="JavaScript" type="text/javascript">function Show(Url,
Name, Features) { window.open(Url, Name, Features); }</script>

Then if I were you, I would create the hyperlinks that you are going to
insert in NotePad, and copy and paste when you insert in the hyperlink
address field (use Ctrl + V). Once you get one link to work correctly, then
you have a "template" in the NotePad text file that you can just copy and
paste other URLs into, and paste the javascript into Pub.

Part of the fun of web design is learning how to do different things. Just
jump in and do it, and you will gain some satisfaction when you are
successful. Its always hardest the first time...

DavidF