You need to checkout Stories. It may be a better fit for you, rather than scripting...
Basically, you could do something like this. In Graphical View select the Track and click Add Story. Then re-name it Technical bits. Double click the Story to open the Story Editor and add Chapter 3, 6, 9 & 11 to the entry list. Set the Technical bits button to target the Technical bits Story. Set the Menu Call & End Jump for the Technical bits Story to the Technical bits Button.
You get the idea...
Stories allow you to re-use content (Chapters) without increasing the project size as well as easily create different playback orders for the Tracks chapters. You could for example play the chapters in another order 11, 6, 9 & 3 by dragging the entries into a different order,
Hope that helps,