Custom sort order for Collection?

[MastodonFarm]

I am putting together a Collection based on AFI's Top 100 movies.  Within the collection, I would like to sort by the order in which the movies are ranked, from 1 to 100.  Is there a way to get this sort order for the Collection, without affecting the sort order of the Library where the films live?  When I change the sort title in a film's metadata, it also affects the sorting in the Library as well as in the Collection.