prob joining VOBs; also sync prob with another movie

[spiritgumm]

I have a 2-dvd retail release (contains 4 movies) which split one its movies between the 2 discs. I'd like to combine that movie and keep the close-captioning. Reauthored it with TDA 1.6, and ran that thru Pgcedit to check the cell list (joining separate videos in TDA makes a cell with an empty checkbox). Ticked the unchecked checkbox for smooth playback, but there's some playback problems if I try to navigate in a dvd player around the juncture (stalls or audio goes out). It would probably play fine if the dvd player was left alone, but I'd like the video to work consistently.
Using the original VOBs, I merged them with VOBmerge, made new IFO's with IFOedit, and tried to load that into TDA for authoring, but it doesnt preview correctly in TDA. It doesn't play right in MPC either.
Both halves seem to have the same attributes. I believe they're both 23.976 fps with 3:2 pulldown.
Is there something else I should be doing? Is there a method to join them so I keep the close captioning?
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Unrelated to the above, I have a dvd (which was made from a divx I dont have) wherein about half way thru, the audio sync starts to drift. Aside from making incremental changes in the audio track, is there another fix? I haven't tried it yet (because it doesn't seem like it would work), but I was thinking of slowing down the audio (or shortening the length) between middle and end to see if that improved the sync enough to live with.

[filmboss80]

If the source is a retail release, you just need to back up the original, not the 2-disc copy. If you do not have the original retail release, then what you are doing is illegal, and we cannot assist you and become accomplices. Same goes for the divx-based DVD.

[spiritgumm]

If the source is a retail release, you just need to back up the original, not the 2-disc copy. If you do not have the original retail release, then what you are doing is illegal, and we cannot assist you and become accomplices. Same goes for the divx-based DVD.

well, that was thoroughly nonsensical and unhelpful reply

[nic2k4]

Why would you go through the trouble to merge two VOB's and create new IFO's.... Just insert the two separate disc (movie halves) in the same track in TDA and they will play consecutively with no pause.

[spiritgumm]

Why would you go through the trouble to merge two VOB's and create new IFO's.... Just insert the two separate disc (movie halves) in the same track in TDA and they will play consecutively with no pause.

Re-read my post - when I did that, I had some playback issues on a dvd player. It might be an issue with TDA 1.6 (not later versions if that's what you use).

[nic2k4]

Re-read my post - when I did that, I had some playback issues on a dvd player. It might be an issue with TDA 1.6 (not later versions if that's what you use).

Oops sorry, got caught up with all the information at the end of your post. Anyway, try creating a new DVD in TDA for each of your movie halves (one DVD for each half) and import that into TDA. TDA is very good at fixing DVD errors. Does 1.6 keep Close Captions? I don't think it keeps subs.