[Plugin: WP Bannerize] How to put spaces between ads?

Hi.

I want to put spaces between ads in WP Bannerize, but I don´t know how and I don’t know HTMl.

The space between the ads should be 2 pixels wide.

Please give me the correct code.

Thank You in advance

Bocage

http://wordpress.org/extend/plugins/wp-bannerize/