Use HTML in a Text Widget (Most ad co’s allow you to copy a code snippet in Javascipt or HTML – use the provided HTML.)
Seacoast, I tried that text widget but it was bringing just the text. I actually do not know how to attach the image and make if flash.
Please, help
it might help if you can post the exact code of the ad you want to show;
‘flash’ might need a plugin to help integrating it; http://wordpress.org/extend/plugins/search.php?q=flash+embed