DOCBOOK-APPS: Where do I put my customization file?

Hi,

I want to move most of my changes out to a customization file ... :-)

Where do I put that file so that it is picked up?



Regards
-------
Richard Sharpe, 
Samba (Team member, www.samba.org), Ethereal (Team member, www.ethereal.com)
Contributing author, SAMS Teach Yourself Samba in 24 Hours
Author, Special Edition, Using Samba