Identity transform of stylesheet

I need to perform an identity transform on a stylesheet to add an attribute to each and every LRE.  The stylesheet(s) are of the form:

<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:include href="foo.xsl"/>
<xsl:template match="/">
  <xsl:apply-templates/>
</xsl:template>
</xsl:stylesheet>

The issue is performing the transform after all of the includes/imports of the xsl have been processed, rather that just the 6 line xml document.  Does anyone have any ideas?  Im currently thinking of applying an initial transform to extract the hrefs and then process them seperately, but I think I will run into URI resolver issues.  Ideally, I would like to be able to take the transformer object and process that as xml... as that would be the entire stylesheet, but of course Im more than likely talking rubbish here :)

Any ideas?

cheers
andrew

ps.  this is a repost, but hopefully phrased a little nicer.

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