The following post shows how to put one *after* the search bar. I know it's not exactly what you want but it may be helpful to you.

http://www.gossamer-threads.com/...orum.cgi?post=279839

An example of a site where I've placed the banner in this location is www.love-romance-dating-directory.com

To put a banner between the nav bar and search bar, I guess you would need a div section in the include_header template in between the nav and search divs.

Regards,
Peter Puglisi
www.ausfreedom.com
Ultimate Freedom is our game.