Hi Org,

here is a patch to master that allows one to inhibit the addition of the
header line to newly created archive files.

    2013-01-28  Christopher Schmidt  <christopher@ch.ristopher.com>

            * org-archive.el (org-archive-add-header-to-new-files): New
            option.
            (org-archive-subtree): Honour
            org-archive-add-header-to-new-files.