Token options in wkhtmltopdf header/footer

G'Day all,

Question: is it possible to pass replacement tokens to the header/footer?

I'd like to have a bit more control over content in the header and footer areas, including the capacity to insert cck field values via replacement tokens.

There's a good summary of options from the command line at:
wkhtmltopdf --help

And the developers are at: http://code.google.com/p/wkhtmltopdf/

However, they aren't native Drupal people. I've tried a simple insert and it just gets ignored (gracefully).

Thanks.