Word 2003/ .NET XmlDocument / ASP.NET web page

I have a .NET webservice which is returning me an XmlDocument which is
effectively a word 2003 document. If I were to save the file to disk and
open it, it opens with word 2003 as required. What I want to do is have an
Asp.NET web page which consumes the webservice, then returns the word
document to the user via the web-page, without having to save the file to
disk.

Can this be done by rendering the XmlDocument to the page then setting the
content-type, or is there a better way to achieve this?

Many thanks in advance.

James