Good news!
VLC has reached v.2 and the uPnP streaming capability that was previously only available in the Linux version is now also present in VLC for Windows.
1) Install VLC v.2.
Download here.
2) Run and click
View -
Playlist
3) On the left, select
Local Network -
Universal Plug'n'Play.
4) The Humax should appear in the file browser. Navigate to the file required and click!
This needs Humax media sharing to be enabled. You get full control and all the usual VLC goodies, like video and audio tweaking. On a standard setup, only SD files can be streamed, due to the restrictions built into the Humax.
However, with the modified firmware and auto-unprotect, you can also stream HD files direct to VLC. If - like my old lappy - your hardware hasn't got the required graphics clout, then you can also use the VLC Mozilla plugin which works in Firefox and Chrome (haven't tried other browsers). It seems to handle HD on old kit pretty well. More good news - the plugin no longer crashes when you close it, but there is still no FF/Rewind.