Adding New Widget Areas & Position Widgets in Area

I would appreciate it if you could direct me to a thread/tutorial that describes:
1. How to insert new widget areas in a specific region. I read through the various threads and ATO>Add Widget Areas.
2. How to reposition a new widget area, as well as widgets in a specific widget area (ie. I added new widget areas, and included the 'sharethis' widget in top right corner above header image with code:
PHP Code:
I found this code in a previous thread, but I can not position the 'sharethis' widget inline with a 'search' bar positioned right in 'region 3'. The 'sharethis' widget sits center in "headwidget_4" and the search bar sits directly below it.

Thanks in advance for any help!