Adsense in CMS Widget

[alaska_av8r]

I am trying to place adsense advertisements on the front page of my CMS. I am using a 180px, 100%, 240px layout for the front page. I did a html static widget that sits right below my sections navigation widget. You can see it here

The problem is that the google adsense is 160 px wide and this looks really goofy in that widget. So to make it look better can I:

1. put an advertisement on the sidebar without using a widget?

2. as it appears if I edit the styling it will affect all static html widgets which I don't want it to do, so can I create a widget call advertising widget with its own styling?

3. I think a widget that was transparent with minimal padding and no title would be perfect.

thanks
tim