You can organize widgets in the header area using Main Options > Header > Header Widget area.
With the basic version of extreme, you can organize these widgets in as many columns as you want. With the Plus Plugin you can have any layout a variable width for them.
You drop your widgets in Appearance > Widgets > Header widget area, and you set options for the layout in Main Options > HEader > HEader widget area
Have a look at this page from the demo site
http://demo.weavertheme.com/insertion-areas/
If you need more help, you need to be more specific