Both IE6 and NS7 can use XSL to process an XML document. You need to insert the following xml-stylesheet processing instruction in your XML document:

<?xml-stylesheet type="text/xsl" href="consumables.xsl"?>

The files http://www.dur.ac.uk/barry.cornelius/papers/xml.processing.using.php/code/xsl.xml and http://www.dur.ac.uk/barry.cornelius/papers/xml.processing.using.php/code/consumables.xsl contain the texts that can be used by both NS7 and IE6.