xtchunk.xsl - Navigation Images

I have just started to create all my documents in docbook format and
convert them to html, pdf, fop using the saxon parser. From what I can
tell xtchunk.xsl, docbook.xsl, chunk-common.xsl and chunker.xsl handle
the formatting of the multiple html file ouput.

What I would like to do is output images instead of text for the
navigation in the header and footer of the page.  I am very new to xml
and still learning the syntax so I'm completely lost sa to where to
modify the files to do this.

Any pointers would be greatly appreciated.

Thanks In Advance,

Brendan Boyle

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list