wdtvLive + USB hardrive = upnp server?

I’s it possible to make wdtvlive + usb harddrive into an upnp server? wdlxtv firmwares, perhaps?

What i mean is that i have another media streamer in another room but it only works with tversity, windows media server etc. and does’nt recognise my wdtv(external hardrive) shares .