I am unaware of any simple way to do what you want, but am certainly no expert, so others might have a better answer for you. Personally, for my own stuff, I use my DVD player's functionality to "play all" by programming in the chapters, then press play. Anyway, possibilities that come to mind:

You could use a scene selection menu which corresponds to chapter points you either define in DVDAS, or markers in Movie Studio. The first option that comes up when you insert a scene selection menu is the number of links per page. If you set that to 1, it will create 1 new page for each chapter point. You can then edit/design/animate/whatever each of those menu pages individually. Using this method, the entire video would play if they select the main video, or you could navigate to whichever chapter you wanted. Once the chapter is selected, it would play through to the end. This assumes you have a single video with multiple chapters, not several videos on a single DVD.

If you have an assortment of videos on the same DVD, and want the ability to play all, or an individual, 2 ideas come to mind.

The first, which requires a lot of space, is to have separate video files for each of your titles, and another which is all of them assembled together as a single video. If a single is selected, it will play and return to the menu. If the "compilation" version is selected, it will essentially "play all". Obviously, this requires twice as much space, and may not be practical.

Second choice here is to assemble this as a music compilation. Sony's own help file has the following tip: "Here's a trick for you: if you want to create a series of videos that play sequentially, you can create a "music compilation" made up of video files. Voila!"

Hope this either provides you with ideas, or helps you with any conclusion regarding the use of different software. Again, I have not really used DVDAS to do anything all that fancy, so there could be other options of which I am simply not aware.