Hi. Select "workout blender" from the main screen of the DVD. You'll see a screen that has several segments from that workout listed. Instructions are actually on that page. I think you select a segment and then click "select". The screen will then bring back the same listing, and you can select the next segment you want to do. once you've chosen all the segments you want to play (in the order you want them to play), you hit "play".
Unfortunately, the technology only allows for segments from individual workouts to be blended. In other words, you can't blend parts of Step Blast with parts of Step, Jump and Pump. BUT, you can use the Mix and Match menu to do that, or if your player is programable you can blend whatever you want so that you don't have to keep going back to the Mix and Match menu after each segment has played.
Good luck!