Okay, I have a wordpress website and everything is set up, but I just designed a new banner for my website, but I want it to be an image map. I already formatted the html and everything I just don't know exactly where to put it. Where is the header info at in wordpress? I found header.php but that's not the correct file.
It depends on the wordpress template that you are using. The header.php file should contain everything in the <head> section and some include the wrapper so it maybe that where you want to place your advert is at the top of the index.php file. This may help you find out which file you need to put it in http://www.blog.spoongraphics.co.uk/tutorials/how-to-build-a-custom-wordpress-theme-from-scratch
The header should be in header.php but some themes got a more complicated include-system, so you may find it in some folders under the theme folder. It would be easier if you let us know what them you are using. Regarding the placing of your banner.. If you put it in index.php it will only show on the front page if you put in in the header.php it will show on every page. I Didn't understand the issue with the image map there, but if you want to do a really good image map use Dreamweaver. It's very simple and they got the tools for it