DOCBOOK-APPS: DocBook XML/XSL - shaded?

I'm switching over from SGML/DSSSL/Jade to XML/XSL/Xalan. 

I've got most things working OK except I can't find a parameter like
%shaded-verbatim% to make my program listings display with the nice grey
background. 

Is there an easy way to do this? Does someone have a modified XSL template
that shows how to accomplish this? 


Howard Ship
Senior Consultant
PRIMIX
311 Arsenal Street
Watertown, MA 02472
www.primix.com

(617) 923-6639