XHTML+SMIL into MHT format

Hi all

Does anyone know whether it is possible to compact an XHTML+SMIL file into
MHT (the MIMEd HTML which incorporates all binary data [e.g images] into the
body of the html file, such that it is distributable as a single file).  Is
it possible to use it for XHTML+SMIL?

I have tried doing it, but so far does not seem to work with <t:img> or
<t:audio> (in the sense that binary attachments as pointed to by those tags
do not get incorporated into the mht file - at least not using IE's "Save"
menu command.  I hypothesize that <img class="time"> might work for images,
but I don't believe there is any such "native" tag <audio> in html.

Does anyone have any ideas or pointers in this regard?

Thanks

Steve bennett
University of Hertfordshire