Video_ts.bup

[vdv]

When choosing to remove annoying PGCs, RCE, et al., I suppose DVDFab does this by altering VIDEO_TS.IFO?

1. Is that right?
2. Does it alter any other files, or remove them from the copy? (since VOB containing copyright PGC wouldn't be needed anymore)
3. Specifically, is VIDEO_TS.BUP preserved as-is?
4. If VIDEO_TS.BUP was not present, does DVDFab generate one, as a copy of the original VIDEO_TS.IFO?

AFAICT, if VIDEO_TS.IFO is altered, then so is VIDEO_TS.BUP. Is there any information stored in the copy that would allow me to reconstruct the original VIDEO_TS.IFO?

[Mona]

DVDFab does this by altering VIDEO_TS.IFO;
Once VIDEO_TS.IFO is modified, VIDEO_TS.BUP modified accordingly;
VOB file is modified too, to remove some protection.

[vdv]

thank you