Has anyone been successful with installing the DLNA aspect of the subject bundle using MediaTomb on a Foxsat HDR and got it working with any of the KDL-xxEX503 range of Sony Bravia TVs?

I think one of your problems might be that MediaTomb is more UPnP that DLNA. The compatibility of MediaTomb and Sony Bravia TVs has been discussed on the Sourceforge MediaTomb forum.

But you have drawn my attention to the fact that the new package contains MediaTomb which I use for music streaming from my NAS, so I might try it again on my PVR.