The teh order you enter things in the 'Configure Header Area' options is the order they will show up. If you code %pages, %logo, %bar1 the the page menubar will be on top followed by the logo then bar1
if you code %bar1, %image, bar1, %page-center, %bar2 then you would get
page menubar centered
as you can see (I used %bar1 twice) you can specify things more than once. You can even add a new widget area here or any other html you want.