Movie Set Info/Summary etc

I have been searching through various other threads about this over the past few hour with no real definitive result.

How do I add information to display for a movie set?

I have seen some skins (Titan and others) with a summary of the movies in the movie set where the plot would normally be, but I have been unable to replicate this on the skin that I am using (Amber). I would be happy enough just to have the titles of the movies listed in the summary as opposed to – ‘Movie Set’

Can anybody please offer a suggestion.

Thanks