Yes the downloads are chaptered. I learned about software, called Handbrake, here, and I make simple premixes with it. If I wanted all the premixes, I'd buy DVD's but I find I only use two maybe, so I can handle that. There is a thread "Where is the Workout Blender for Download Users" that has the information on the software. mandarinfish is the member who provided the info. I have added the stretches to bonus workouts and simple stuff. I haven't needed other software, just the one that lets me isolate chapters. On the thumb drive, they just run in alphebetical order, so I just put them in a folder in the order I want them to run. I don't need other software for that. It's also good for making workout sheets.