I need to put articles in cotegories and subcategories in the way downloads are made, is the soch module?

And can i edit templates from the panel, becouse there is only View button.

The news module allows for catagories and subcats, also you may wish to try the following:

+ WFSections
+ Articles

And there are many more which can be found by searching.

Templates.

First of all you need goto templates them duplicate them, and from

admin ---> system admin ---> preferences

Change the templates to use your duplicates.

Now if you goto templates admin you will be able to edit the duplicates.

Hope this is of help.