Check in the other bits of the modified VHM interface :-(

lib/python/Products/SiteAccess/www/VirtualHostMonster.dtml

 <dtml-var manage_page_header>
 <dtml-var manage_tabs>
 
+<h3>The Virtual Host Monster supports virtual hosting</h3>
 <p class="form-help">
-This Virtual Host Monster changes the URLs generated inside of the 
-Folder in which it is placed, using information passed to it in special URL 
-path elements.  Its purpose is to support virtual hosting, by 
-allowing you to centrally control the protocol, host, and path of the 
-URLs that Zope generates.
+It changes the protocol, host, and/or path of URLs generated by Zope.
+Values affected include REQUEST variables starting with URL or BASE 
+(such as URL1, BASE2, URLPATH0), and the absolute_url() methods of
+objects.  By changing these, the Virtual Host Monster allows you to
+host several different domains in a single Zope.
+</p>
+<p class="form-help">
+The most common sort of virtual hosting setup is one in which you
+create a Folder in your Zope root for each domain that you want to
+serve.  For instance <strong>http://www.buystuff.com</strong> is
+served from Folder /buystuff.com while
+<strong>http://www.mycause.org</strong> is served from /mycause.org.
+</p>
+
+<h3>One is enough</h3>
+<p class="form-help">
+A single Virtual Host Monster in your Zope root can handle all of your
+virtual hosting needs.  It doesn't matter what Id you give it, as long
+as nothing else in your site has the same Id.
 </p>
 
+<h3>You must add special names in the path</h3>
 <p class="form-help">
-This object doesn't do anything unless you insert one 
-or both of the following special path elements into a URL: 
+The VHM doesn't do anything unless it sees one
+of the following special path elements in a URL: 
 <em>VirtualHostBase</em> sets the protocol and host, while 
-<em>VirtualHostRoot</em> sets the path root.  You would insert 
-these path elements using an Apache RewriteRule or ProxyPass 
-directive, or with a Zope Access Rule.
-</p>  
+<em>VirtualHostRoot</em> sets the path root.</p>
 
 <p class="form-help">
 If the URL path of a request begins with 
-&quot;/VirtualHostBase/http/www.foo.com&quot;, for instance, then 
+&quot;/VirtualHostBase/http/www.buystuff.com&quot;, for instance, then 
 URLs generated by Zope will start with
-<strong>http://www.foo.com</strong>.
+<strong>http://www.buystuff.com</strong>.
 Since the port number was not specified, it is left unchanged.  If
 your Zope is running on port 8080, and you want generated URLs not to
 include this port number, you must use
-&quot;/VirtualHostBase/http/www.foo.com:80&quot;.
+&quot;/VirtualHostBase/http/www.buystuff.com:80&quot;.
 </p>
 
 <p class="form-help">
@@ -37,28 +50,66 @@ will traverse &quot;a/b/c/d&quot; and then generate a URL with
 path <strong>/d</strong>. 
 </p>
 
+<h3>You add these names by rewriting incoming URLs</h3>
 <p class="form-help">
-If <em>VirtualHostRoot</em> is followed by one or more path elements
-that start with '_vh_', then these elements (without the '_vh_') will
-be skipped and then added to the start of generated URLs. 
-For instance, a request with path &quot;/a/VirtualHostRoot/_vh_z/b&quot; 
-will traverse &quot;a/b&quot; and then generate a URL with
-path <strong>/z/b</strong>. 
+Visitors to your site don't see these special names, of course.
+You insert them into the path using either an external rewriter,
+such as an Apache RewriteRule or ProxyPass directive, or by
+setting up a mapping on the &quot;Mappings&quot; tab.
+</p>  
+
+<p class="form-help">
+For example, suppose Zope is running on port
+8080 behind an Apache running on port 80.  You place a Virtual Host
+Monster in the Zope root Folder, and use Apache to rewrite &quot;/(.*)&quot;
+to <strong>http://localhost:8080/VirtualHostBase/http/www.buystuff.com:80/buystuff.com/VirtualHostRoot/$1</strong>.
 </p>
 
 <p class="form-help">
-Combining both allows you to cause a subfolder to act as the root of a 
-site.  For example, suppose you want to publish Folder &quot;/foo&quot; as
-<strong>http://www.foo.com/</strong>, where Zope is running on port
-8080 behind Apache running on port 80.  You place a Virtual Host
-Monster in the root Zope folder, and use Apache to rewrite &quot;/(.*)&quot;
-to <strong>http://localhost:8080/VirtualHostBase/http/www.foo.com:80/foo/VirtualHostRoot/$1</strong>
+You could get the same effect in a standalone Zope by adding the line
+<code>www.buystuff.com/buystuff.com</code> to the &quot;Mappings&quot;
+tab.  In either case, requests for
+<strong>http://www.buystuff.com/anything</strong>
+will look for Zope object <strong>/buystuff.com/anything</strong>.
 </p>
 
 <p class="form-help">
-Values affected include DTML variables starting with URL or BASE 
-(such as URL1, BASE2, URLPATH0), and 
-the absolute_url() methods of objects.
-</p> 
+You should only use the &quot;Mappings&quot; tab for simple virtual
+hosting, in a Zope that is serving requests directly.  Each mapping
+line is a host name followed by a path to a Folder.  The VHM checks
+the host specified in each incoming request to see if it is in the
+list.  If it is, then the corresponding path is inserted at the start
+of the path, followed by &quot;VirtualHostRoot&quot;.
+</p>
+<p class="form-help">
+You can match
+multiple subdomains by putting &quot;*.&quot; in front of the host
+name, as in &quot;*.buystuff.com&quot;.  If an exact match exists, it
+is used instead of a wildcard match.
+</p>
+
+<h3>Inside-out hosting</h3>
 
+<p class="form-help">
+Another use for virtual hosting is to make Zope appear to be part of a
+site controlled by another server.  For example, Zope might only serve
+the contents of <strong>http://www.mycause.org/dynamic_stuff</strong>.
+To accomplish this, you want to add &quot;dynamic_stuff&quot; to the
+start of all Zope-generated URLs.
+</p>
+<p class="form-help">
+If you insert <em>VirtualHostRoot</em>, followed by one or more path elements
+that start with '_vh_', then these elements will
+be ignored during traversal and then added (without the '_vh_') to the
+start of generated URLs. 
+For instance, a request for &quot;/a/VirtualHostRoot/_vh_z/&quot; 
+will traverse &quot;a&quot; and then generate URLs that start with
+<strong>/z</strong>.
+</p>
+<p class="form-help">
+In our example, you would have the main server send requests for
+<strong>http://www.mycause.org/dynamic_stuff/anything</strong>
+to Zope, rewritten as
+<strong>/VirtualHostRoot/_vh_dynamic_stuff/anything</strong>.
+</p>
 <dtml-var manage_page_footer>

lib/python/Products/SiteAccess/www/manage_edit.dtml

+<dtml-var manage_page_header>
+<dtml-var manage_tabs>
+
+<p class="form-help">
+You may edit the mappings for this Virtual Host Monster using the form below.
+<strong><em>You don't need to use this tab</em></strong> if you are using
+Apache or some other front-end server to rewrite requests.  This is
+only for simple virtual hosting in a bare Zope server.  If you place
+the hostname that you use to manage your Zope in this list
+<strong><em>you are likely to regret it</em></strong>, and will
+probably need to manage Zope using its raw IP address to fix things.
+</p>
+
+<form action="set_map" method="post">
+<table cellpadding="2" cellspacing="0" width="100%" border="0">
+
+<dtml-with keyword_args mapping>
+<tr>
+  <td align="left" valign="top" class="form-label">Last Modified</td>
+  <td align="left" valign="top" class="form-text">
+<dtml-var bobobase_modification_time fmt="%Y-%m-%d %H:%M">
+  </td>
+</tr>
+
+<tr>
+  <td align="left" valign="top" colspan="2" class="form-help">
+  Each line represents a path mapping for a single host 
+  (<strong>host/path</strong>),
+  or a set of hosts (<strong>*.host/path</strong>).
+  <div style="width: 100%;">
+  <textarea name="map_text:text" wrap="off" style="width: 100%;"<dtml-if 
+   dtpref_cols> cols="<dtml-var dtpref_cols>"<dtml-else
+   > cols="50"</dtml-if><dtml-if dtpref_rows> rows="<dtml-var 
+   dtpref_rows>"<dtml-else> rows="20"</dtml-if>><dtml-in 
+   lines>&dtml-sequence-item;
+</dtml-in></textarea>
+  </div>
+  </td>
+</tr>
+</dtml-with>
+
+<tr>
+  <td align="left" valign="top" colspan="2">
+  <div class="form-element">
+  <dtml-if wl_isLocked>
+   <em>Locked by WebDAV</em>
+  <dtml-else>
+   <input class="form-element" type="submit" name="SUBMIT" value="Save Changes">
+  </dtml-if>
+  &nbsp;&nbsp;
+  <input class="form-element" type="submit" name="SUBMIT" value="Taller">
+  <input class="form-element" type="submit" name="SUBMIT" value="Shorter">
+  <input class="form-element" type="submit" name="SUBMIT" value="Wider">
+  <input class="form-element" type="submit" name="SUBMIT" value="Narrower">
+  </div>
+  </td>
+</tr>
+</table>
+</form>
+
+<dtml-var manage_page_footer>