> 	Presumably that means the ghelp: -> file: trickery in gnome-lib
> 	is probably going to be the best option? :)

Yeah. Looks like it's not even quite as bad as I thought: the ghelp
URLs have full paths now, and gnome-moz-remote will rewrite "ghelp" to
"file" if it gets it. So all we need to do is make gnome-libs fall
back to the default handler (gnome-moz-remote, which in turn launches
mozilla or netscape) if it can't execute the one it originally wanted:

--- gnome-libs-1.2.11/libgnome/gnome-url.c~	Mon May 22 17:24:03 2000
+++ gnome-libs-1.2.11/libgnome/gnome-url.c	Tue Feb 13 10:09:23 2001
@@ -68,6 +68,8 @@
 	return default_handler;
 }
 
+static int gnome_url_show_with_handler (const gchar *url, const gchar *template);
+
 /**
  * gnome_url_show
  * @url: URL to show
@@ -93,11 +95,9 @@
 void
 gnome_url_show(const gchar *url)
 {
-	gint i;
 	gchar *pos, *template;
 	gboolean free_template = FALSE;
-	int argc;
-       	char **argv;
+	int status;
 	
 	g_return_if_fail (url != NULL);
 	pos = strchr (url, ':');
@@ -123,12 +123,26 @@
 	} else /* no : ? -- this shouldn't happen.  Use default handler */
 		template = gnome_url_default_handler ();
 
+	status = gnome_url_show_with_handler (url, template);
+	if (status == -1 && free_template)
+		gnome_url_show_with_handler (url, gnome_url_default_handler ());
+
+	if (free_template)
+		g_free (template);
+}
+
+static int
+gnome_url_show_with_handler (const gchar *url, const gchar *template)
+{
+	int argc, i, status;
+	char **argv;
+
 	/* we use a popt function as it does exactly what we want to do and
 	   gnome already uses popt */
 	if(poptParseArgvString(template, &argc, &argv) != 0) {
 		/* can't parse */
 		g_warning("Parse error of '%s'", template);
-		return;
+		return -1;
 	}
 
 	/* we can just replace the entry in the array since the
@@ -142,13 +156,12 @@
 
 	/* use execute async, and not the shell, shell is evil and a
 	 * security hole */
-	gnome_execute_async (NULL, argc, argv);
-
-	if (free_template)
-		g_free (template);
+	status = gnome_execute_async (NULL, argc, argv);
 
 	/* the way the poptParseArgvString works is that the entire thing
 	 * is allocated as one buffer, so just free will suffice, also
 	 * it must be free and not g_free */
 	free(argv);
+
+	return status;
 }