Ad- Customization


I know there's the ad templates that I can use to place my ad where I choose. Except when I place them in ad_under_top_breadcrumb, for example, it shows on every page. I just wanted it to simply show on the home page, what should i edit?

Also, I got another ad to show next to my logo, but when i try to center it, it pushes my logo down, how would I go about placing it so it 'floats' on the right side of the header?