Okay, if I understood you correctly you want to have some page(module) as your main page.
For the start can you give me the url of the page so that I can know what module you are talking about.
To set a specific model as your homepage go to:
CP » Settings » Common settings
Scroll all the way down and fine this
When opening the main page, redirect to:
You should see drop down menu there from where you can pick a specific model as your homepage.