[Using plugin] Review of my adsense places

Hi all, i am not able to add anything like banner at my homepage (after my header) using "ad injector" but i can post this kind of ads inside of my posts and widget.

What do you guys think about my positions? (Widget, Beginning of posts and footer of posts)

Blog:
http://bit.ly/gjq5Xn

O really would like to have some ads at the main page, before the contend but this plugin can´t do it, does someone knows another plugin?

 

Modify your style.css?

 

I´ll search how to do that, i have no skills with css yet, but thanks for the tip