Inserting a banner across main page, category, forum and threads

[Apolo.]

Hi,

I'd like to insert banners to be displayed no matter if you're seeing main page, a category, a forum or a thread. All pages.

I believe the best was for me to explain it, would be with an example. Please see here:

http://www.hostingdiscussion.com
http://www.hostingdiscussion.com/web-hosting-reselling/
http://www.hostingdiscussion.com/web...-worldpay.html

so no matter if you are seeing main forum, a forum, a thread, or replying, etc, you always see that 4 advertising spots just beneath the main navigation bar.

I already found this:

Admin CP -> Styles & Templates -> Style Manager -> Forum Home Templates

But I'd like to find an easier way instead of editing each template to include those spaces for advertising.

Thanks in advance for your advice.