Ad-space manual coded outside sidebars ?

We want to have some advertising outside of the sidebar on http://johannaostlund.se.
By manual encoding I think is the only way ?
We couldn’t get WP or the theme – PageLine – as wide as the screen.
Is there any settings in WP for that ?

But we want advertising all the way out to the left and right – white area.
How to code that ?

We also installed – Ad Injection – for advertising in the blog.
Instead of ads in the Blog we want it floating at the very lower end of the screen even when scrolling.
How to code that ?

In a short sentence : Ads on the sides and the bottom of screen.

Can some basic coding.