ok. I think I made some progress here. I have VirtualDubMod 1.5.10.2 installed and AviSynth 2.5. I have also DirectShow, as I installed PowerDVD 7.
When I open the ts file through VirtualDubMod I select the template "DirectShowSource" and hit "Open". It freezes for a couple of seconds and then an error pops up.

"No video stream found."

Anyone got a clue? What am I doing wrong?

Thanks Moth3r, you are really helping me out here!

EDIT: Here are the specs taken from the nfo:
* Audio : Dolby 2.0 *
* Bitrate : 448 *
* CoDeC : AVC/H.264 *
* Frame Rate : 25fps *
* ReSoLuTioN : 1920x1088i *