Adding a conf directory to distribution output

In my application I have the jar build creating a "lib" directory with all the appropriate libraries in it. The application distribution also needs a "conf" directory with a few xml files that occasionally need changing without having to go through a rebuild of the application. How do I bundle this directory into the build? The "Add.." button on the "Build Jars.." screen only allows me to select libraries or modules, of which this is neither.

Thanks

Chris