joomla template modification

is it possible to get rid of the green image at the top and put a logo there to make it more adjusted?

http://joomla15.siteground.com/?template=siteground-j15-68

 

I'm not an expert with Joomla but it looks like you will need to alter your CSS. Look for something like this:

#headerimg {
background: url(path/headerimg.jpg) no-repeat;
}

Code (markup):

Then simply change the filename to your logo.

T