Hi there.
There is some code in the help files that will help you. I have copied and pasted it here for convenience:
Advanced: Manually creating a web site home page
If you want to add some HTML that will automatically route visitors to the first page of your catalog home page, then try the following sample code. Copy the following code into 'Notepad' or an equivalent text editor and then save it as 'index.html'. Then, upload to the 'root' of your website. It assumes the online catalog is in "/acatalog".
<HTML>
<HEAD>
<META HTTP-EQUIV="refresh" CONTENT="0; URL='http://<mysite>/acatalog'">
<TITLE></TITLE>
</HEAD>
<BODY>
<P>Please wait to be forwarded to our catalog or press
<A HREF="http://<mysite>/acatalog">here</A>. </P>
</BODY>
</HTML>
Alternatively you can link the directory to your existing web site by adding the following suggested HTML:
<A HREF="mysite/acatalog/index.html">Online Catalog and Ordering</A>
where <mysite> must be replaced with details of your own site.
(c) Actinic Software Ltd
I hope this helps