HTTP digest security using REQUEST DOCUMENT?

Hi all.

I’ve written a few WS clients in normal Natural using the REQUEST DOCUMENT command and they work quite well (aside from having to code the SOAP packet manually myself), but now I have a requirement to call a Web Service that uses HTTP digest security (not basic HTTP Auth).

Does anyone know of a way to impliment this using the REQUEST DOCUMENT command in natural?

Help/comments/wild speculations gratefully accepted.

Kind regards