Hi there.
What you're saying is just wonderful. I reaaaallly hope this chap will share his method because I think you're awesome news
Those "pluzz" people, they've been changing the protocol and access and all a lot lately and people who were doing the software to get the videos, they got pissed off and so the existing software development is kinda stalled.
I myself don't understand everything, but I'll give you some link, hopefully it helps, even if I think that would be more than welcome if the original poster of this thread would share technical details with you directly.
http://code.google.com/p/tvdownloader/downloads/list
the software is called pluzzdl and its able to get the fragments and put em back altogether. It's opensource python, maybe you can have a look at it later, if you don't get your answer here, so maybe, if that was okay with you, you could share with pluzzdl team...
Sorry to be bothering, I'm just an end user who'd really like this (free as in freedom and people working together, giving credit and all) software to work once again