How to make header image not span full width of the page

I would like to make the header image not span the whole width of the page and have the right widget bar go up along side of it so that it would be sitting next to the widget bar. Any ideas? Thanks!

If you want the right sidebar to go beside the header you will have to use the ATO>Add New Widget Areas functionality and add a widget area at the top of the loop. Then put a widget in it with the header image.