How To Modify The Separate Settings Page Of My Module?

General General Questions
1

I want some more functionalities to it. I added some with javascript via functions in actions.functions.post.php. It is okay? I know |I should modify some mode.tpl but the documentation is very poor about it and there are no other tutorials about this

2

You can call separate template for your addon. Use Searchanise module as example

3

Thank you