Custom module with existing pages

Hi

I have to create a custom module with existing pages.

for example:- I have a page course underneath the course I have chapters. I want to know is there anyway in kentico cms by which i can add the courses and chapters pages in the custom module. When i create custom module it provide the template type but how to add these existing pages in the module. Please suggest me how we can do this ?

1. Course1 Chapter1 Chapter2 Chapter3
2. Course2 Chapter1 Chapter2

Now same tree I need to show in the custom module.