Ok, I've mucked around trying to find a workable solution for these files.

I've tried changing the ty files to vobs, and then joining them with other vobs, and making an mpeg, and changing it back to vob, that didn't seem to work, then I tried joining vobs, that was somewhat successful, but the chapters won't work in the second file. Hmm, I think I might look at this tomorrow.

I've just finished drinking the 6 pack of Rum and Cola's I bought, now that there's nothing left to do, I'm going to bed to watch a couple of episodes of The Simpsons.