How do I use DTS with "full copy" guide?

You do not have a DTS file. The "AC3" file you referred to is Dolby Digital. DVD2AVI does not extract DTS. You have to use DVD Decrypter for that. That being said, if you're following the guides() then you shouldn't have a problem. However, if you do not realize that "AC3" does not denote DTS then you may find them (and thus, your project) a bit complicated. PS. I edited the title of your post. Please try to make it more descriptive of your exact problem/question next time. Thanks!

Thanks for the info! I was not aware that it supported DTS now. Unfortunately, it does not support CLI so I'm going to stick with the automated way of using DoItFast4U! It's time consuming enough recreating some titles. I'll take the speed advantage where I can find it. :)

Thanks for the replies. In the end it worked fine, the latest release successfully extracted the DTS track and I replaced Audio Track 1 with it (originally DD5.1). I was going to see if I could fit the 5.1 and DTS tracks on, but I was marginally over and so decided to just leave it with DTS. This all works fine, but I was wondering whether it's possible to keep DD2.0 (or 5.1 -- assuming there's space) along with DTS, putting DTS in the same position as on the original compile so that when you go to the audio menu it selects it? From any of the DVDs I've looked at using IFOEdit the DTS track appears to be at a set location? Other languages use a range of values like 0x70 through 0x77, whereas DTS almost always seems to be something like 0x7E. The hex values aren't correct, but its that kind of thing.

Yes, you can keep any audio you like.