The files on the zg are ts which are mpeg2 which don't carry metadata, which are what the other files are for amongst other things.
Download edEIT to edit the eit file and Notepad++ for the meta.
*.ts
file with the DVB Transport Stream, the actual recording
*.eit
file with the EPG info and audio channels info
*.ts.ap
video cut file, for the cut plugin
*.ts.meta
meta info, used for the display of the movie list
*.ts.cuts
stores the last position where the movie was stopped while playing
*.ts.sc
file with info for cutting the movie with the MovieCut plugin.
This file stores several informations about the recorded movie.
E.g. it includes the cut positions for the MovieCut plugin, or structure info about the .ts files for improved fast forward/rewind.
This file is mandatory, without it the movie cannot be played without problems.
If you need it any more in depth you will have to ask someone who regularly plays about with this stuff... I'm just a faffer! (and a googlehound)