The short answer is no: although the DLNA service will be accessible from the TV's client, the reported experience is that the TV's media player is unable to decode the streams (not even StDef). We know of no TV or media player (other than another Humax) that can, the solution being to use a PC or a HD-FOX T2.
It is certainly the case that (using the custom packages) it would be possible to make the HDR think a NAS was a USB drive and make decrypted copies of recordings on it. The problem is whether your TV could decode the content of the resulting files (by which I mean whether it has the right codecs to understand and display the video/audio, even once the file has been decrypted). In our experience it won't.
Decrypting is no problem, but transcoding to a different video format is too much to ask of the Humax and would have to be done on a PC. This is where on-the-fly transcoders (such as Servio) come into the picture.