What tpl should I choose for this faq page? What's the template that controls the /faq-page (from the FAQ Module in Drupal 7)?
I've read the explanation at the top of each tpl file inside the module, but can´t understand what file should I override.

When I enter the /faq-page url, I have the categories. When I click each category, they open in a new page.
So I've tried the faq-category-new-page.tpl.php

But it won't work. I've copied the tpl into my theme, opened it and added some css classes. They won't work (even when I've flushed cache).

What template should I choose? Thanks!
Rosamunda
The most simple solution would be to copy all of the 9 templates from the module directory to your theme, and then add a simple output and see where and how they are used. You can later delete the ones you don't need to modify.

The templates used seems to be based on the configuration settings though, so keep that in mind.