How to store my Documentaries separately?

*** Kodi 17 RC on Windows 10 ***

I use this every day, and it works great!

I like the new Skin, and would prefer not to switch to a different one.

It looks like I should be able to have two sets of TV Shows from the menu options – or perhaps a little source code tweek?

I would like to browse my Documentaries in a separate list from my TV shows.

Any ideas?

Thanks, Andy