Here find this part of the code
[code:1]#logo {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:«»padding;
background:transparent url(templates/coolness/images/logo.png) no-repeat scroll 2px 2px;
width:180px;[/code:1]
the width is at the bottom change to what you like.
I uploaded the logo image right into the template images folder.