Tracks that should be played as an ordered group

Question

The "Overture/Prologue" and "The Launching" from the musical Titanic is six tracks totaling 16 minutes. I want to make them available for inclusion in a Smart Playlist, but they need to be played as a group, and in order.

Similarly, the Canadian Brass "All You Need Is Love" has four "Intro to ..." tracks, about a minute in length, that should be played together with the song they introduce.

Is there any way in iTunes to mark multiple tracks which a Smart Playlist could pick as an ordered group?

Example:

Track   Name
  1     Song of Jasmine
  2     Intro to Kittens
  3     Song of Kittens
  4     Song of Humor
  5     Intro to Geology
  6     Song of Geology Part 1
  7     Song of Geology Part 2

Jasmine, Kittens, Humor, and Geology are not especially related and can be played separately and in any order, but it is not pleasing to hear just the Intro, or just one of the parts of Geology.

How do?