Hi again
I almost succeeded, but now I'm having a little problem.
I created 2 modules, one for banner2, other for banner3. Published them, etc. When I loaded the page the zone was divided, cool, but one showed below the other. So, I changed header.php and put 47 value to both $banner2 and $banner3 variables. This corrected the positioning of both, but now, when both banners show, the background on the rest of the site becomes transparent, look:
Thanks a lot again for your help
UPDATE: when i publish ANYTHING in banner3 position, content background makes transparent