Custom module development

Hello All,

I have many things to ask of which I could not find any proper solution anywhere online.

I am trying to develop a custom module which will do a lot of things including updating records for a specific Page type (Document type). I have created an Alternative Form for that Page type but don't have a clue how to use that in my module. What should be the right approach for this? I tried using "aspx" pages as well as "Page template" could not find any help online on how I can put alternative form in there.

Second, I cannot make the left navigation tabs working properly in my module. Again I tried "Page template" and "aspx" both but don't know how to do it. For example below is the module pages.

Page (list of pages for the that Page type)
- Page Properties (to get the new vertical tab for edit page)
--- Edit Page
--- Manage Products (list of sub-pages, will use another Page type)
----- Products Properties
------- Edit Product
----- New Product
- New Page (adds the new record to the Page type, this is where I am trying to add the alternative form)

I really need to see some similar working examples, if available anywhere.

I don't know if it made any sense to you, still any help will be appreciated.

Thanks, Subhojit