I don't usually do the first step segments- I'll do the cardio conditioning premix from KPC and then go on to the SJP circuit. Talk about a Sweat Fest!!
All of the Body Blast DVDs are chaptered extremely well. I did have to switch my old DVD player in the living room (where I work out) for the new one in the bedroom because they didn't play on the older DVD player (I got at costco in I think 2000 or 2001). HTH