headers and footers in LaTeX output

I've had a bit of a look around, but I haven't yet figured out how to
get headers and footers into a LaTeX document.

I've got "header" and "footer" directives, and I can see the \DUfooter
and \DUheader in the LaTeX source, but I still haven't figured out how
to get LaTeX to use those....

What is the best way to do that?

Thanks,
Carl.