PDF Output in Mapserver

[Sears, Jeremy]

Good Day All,
I'm attempting to create a button that allows clients to have a pdf image of
a map streamed to their browser.

Im using the following document as a guide:
http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?PHPMapscriptPDF

Im running MS4W with Chameleon on an XPbox.

I have a newbie question for anyone with any knowledge in this area. Where
do I add/modify code as described in this doc? Do I create a widget to
implement the pdf output? Do I modify the existing PrintProduction widget?
or should I be thinking about coding elsewhere in my files?

I've go PDFlib(demo) working with my php install and can successfully
execute the PDF generating php code.

Any suggestions would be greatly appreciated.

Best Regards
Jeremy