Adding a "special Feature" in DVDSP project?

I have a client that has some footage (about 20 minutes) that instead of adding it to the end of my sequence, wants it added as a special feature on the DVD. I have never done that before, I usually use button 1 as "view chapters" and button 2 as "play film" do I simply set the asset on a button 3 and label it "special feature"?

Sounds correct.

--ken