[myron]

Hmm.. TMM will support you only in changing existing episodes;
But to create/generate multi episodes out the same filename is not supported in GUI.

You have to manually write down the containing episodes.
But then, we also support a shorter version of naming like: "s1e1-2-3-4-5.iso" (if all episodes are in order and none is missing)

But handling multi episodes in one file is always hard - even for the player.
You want to watch EP3, klick play, and the main menu of DVD starts... and you have to choose your episode again.

The way i'm doing is: remove the DVD menu, and extract every episode to its own file.
Tools like MakeMKV are great - no recoding, just 1:1 copy of video stream.
Then name them accordingly, and import...