Mail Merge on Linux: Save files with a field as part of the name

Hi,

On Linux, I would like to do a mail merge and save the documents using one of
the fields as part of the name. From this link:

http://ask.libreoffice.org/en/question/13555/mail-merge-to-separate-
documents-with-file-names-based-on-merge-fields/

It seems like I should have an option to use a field in the name of the file,
but I don't see that option in the wizard. I tried using the native and the
LibreOffice file dialogs and I don't see that option either.

So my question is: Is this possible on Linux or not? I am using 4.1.1.2.

Thanks,

L