Processing instruction help or otherwise add a border...

I have built a combination of both the slides and straight docbook
format.  All my slides a separate files that are combined via
entities.  I want my "student guide" to have a border around the
section of the slide.

<?pearcec-border

<title>Variables</title>

<itemizedlist>
  <listitem>
    <para>Wide variety of ways to set variables</para>
  </listitem>
  <listitem>
    <para>Assigned in the control section</para>
  </listitem>
  <listitem>
    <para>One control must to exist</para>
  </listitem>
</itemizedlist>

?>

<abstract>
   <para>The Cfengine language provides a wide rang of wa</para>
</abstract>

How do I create a processing instruction that wraps a block with
border attributes for FOP?

NOTE: each slide varies in the tag I use.  Some time it is examples,
some time it is a paragraph, etc.

-- 
Christian Pearce
Perfect Order, Inc.