I have 6 DVD directory structures (around 700 MBs each, each one contains video_ts.bup, video_ts.ifo, vts_01_0.bup, vts_01_0.ifo and vts_01_1.vob). How can I join them onto a single DVD structure? I tried using VOBEdit, but it only accepts the vob files as input, so the subtitle information located in the ifo files is lost, and therefore they appear corrupted. Any help would be appreciated, thanks in advance...