I ripped some DVD's using DVDDecrypter in IFO mode which selects the main movie and splits the resulting VOB files by chapter. I stripped out all streams accept the video and 5.1 english audio. It results in 20-40 chapter files depending on the DVD and one .ifo file VTS_01_0.IFO.

When I try to burn it back to a DVD using CloneDVD2, it says the VIDEO_TS.IFO file is missing. I read somewhere to just copy the VTS_01_0.IFO to VIDEO_TS.IFO. Doesn't work, CloneDVD2 just sits there doing nothing.

So I downloaded IFO Edit. Opened the VTS_01_0.IFO and tried the create new IFOs function and it just says a navigation pack was not found, looks like you are working with invalid VOB files.

I also tried the Create IFOs button and selected the first VOB and it says 'could not find any VOB unit in VOB files' yet I can play these VOBs no problem on the PC and stream to the PS3.