Placing a 728X90 image the right of the logo in header

Hi everyone! I'm new to the forum and about 1 month new into wordpress. So far I love atahualpa theme since I was looking for the easiest theme and this one came up! LOVE IT.

Can someone help me with placing the banner to the RIGHT of my logo. I tried removing the the posts/comments in the top right. I've resized the logo.

Here is what I have in the Configure Header area:
%logo<div class="textwidget">
<a href="https://www.loveloveparties.com" target="_blank"><img src="/wp-content/themes/atahualpa351/images/76090adtoptest.jpg" /></a> %pages %image %cats

I'd love for the site to look like this:
http://forum2.bytesforall.com/showthread.php?t=7295

I don't know what else to do?

site is here

Thanks in advance!