Hello! I download today the them "chaotic soul". On the main page, I would like to change the tittle "chaotic soul" and the both pictures (green/blue).

How should I do?

How about modifying the theme files?

I don't know how to do it :-s I was in the "options" in "themes" but couldn't find anything about what I want to do...

Please read our theming tutorial on our user guide section. Additionally you should have some knowledge about html in general.

Just to note that theme is not officially supported.