DVD Volumes with multiple episodes

There is a series, "A History Of Britain", which is listed in theTVDb by individual episodes.
The NTSC version came in a 5 volume DVD set with 3 episodes per volume.
Having read the metadata info it seems there is not a mechanism to handle this situation.
I suppose one could add something to theTVDb but it would be a duplicate which they don't like.

Is there a way to reflect this in Serviio because at present the volumes are categorised as Genre Unknown.
I don't quite know how to fix that.

[zip]

give an example of your file names and link to the series on thetvdb.com

File names
A History of Britain S1E1-3 V1E1-3.m4v,
A History of Britain S1E4 V2E4-6.m4v
just a couple of examples which I believe match the specs. (the V1E1-3 is just for my information. it's not in theTVDb)
Links
<http://www.thetvdb.com/?tab=series&id=75678>, the main page
<http://www.thetvdb.com/?tab=seasonall&id=75678&lid=7>, after pressing the All button to display the whole data for the series.

[zip]

try to name them:

  Code:

A History of Britain S01E04 V2E4-6.m4v