DOCBOOK: css files into dbsgml (DocPro)

Hope it's ok to post here as I hadn't heard anything for Docbook-apps.

I'm trying to figure out how to implement my cosmetic changes from my .css
file into my docbook files.

If anyone's familiar w/ DocPro, I've got V0.2 and would like to know how to
do this w/ the dbsgml command.

Any help much appreciated.