I have been trying to do the same thing with a lot of issues.
I did get it to work.
I installed the blank box mod.
http://www.zen-cart.com/index.php?main_page=product_contrib_info&cPath=40_52&products_id=174
I created a file called chat.html
In it put your volusion code like mine:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<!-- Begin Volusion Live Chat -->
<div align='center' id='VolusionLiveChat'><a href='http://www.volusion.com/livechat_software.asp'>Free Live Chat Software</a></div>
<script defer type='text/javascript' src='https://livechat.volusion.com/script.aspx?id=155249' ></script>
<!-- End Volusion Live Chat -->
</body>
</html>\[QUOTE]
Upload file to your http://www.<yourstore>.com/chat.html
Then you need to do some editing.
Open /includes/languages/english/extra_definitions/blank_sidebox_defines.php
Start by changing the box title to "Live Help"
FIND: define('TEXT_BLANK_SIDEBOX',
AFTER ADD: '<Iframe src="http://www.stuffupforgrab.com/chat.html" width="130" height="65"></Iframe>');
So line will look like:
define('TEXT_BLANK_SIDEBOX', '<Iframe src="http://www.stuffupforgrab.com/chat.html" width="130" height="65"></Iframe>');
Of course you change the store name to yours.
Then
Open /includes/templates/template_default/sideboxes/tpl_blank_sidebox.php
FIND: $content .= '<p>' . TEXT_BLANK_SIDEBOX . '</p>';
INLINE AFTER:
I didn't want any extra lines, so I used:
$content .= '';
If you want to add a comment, I think this would be:
$content .= '<p>Click icon above for chat</p>';
Or whatever you prefer for a comment.
Hope this helps you out.