Если Вам нужна профессиональная система баннеров, то Вам лучше всего использовать Phpads.
===================
A professional banner system for the people that need professional banners.
The banners are modularized but not integrated because is not needed!
Only need generate the code (i prefer javascript code) and insert into a custom block or into theme.php replacing the actual banners!
In the next RC the actual banners are removed

a sample code for insert into the themes:
echo"";

For realyze a Upgrade, only backup you old /modules/phpads directory, overwrite with this package and replace the config.ing.php with you old backuped config. Go to the admin, press in the phpads logo and the upgrade is automatic.