Comment on Stallion Responsive SEO Theme Layout Options by SEO Dave.

WordPress 2 Column Layouts Question 2 is learn to use widgets.

Add any widget on the Appearance >> Widgets page to the left and right
sidebars and you’ll see the defaults ones are completely cleared. You
have to add one to the left and one to the right to clear, so you
don’t remove them one at a time (common misconception).

No major SEO damage, pretty SEO neutral though the recent one is
useful for getting your new article indexed faster. Also your links
one is useful for adding links to other sites you own, go to Links >>
All Links and delete all the default WordPress links and add your own.

You can use the header widget area for adding an address and phone number.

The header widget is located where the search form is, so you first
have to disable it.

Stallion Layout Options page : Search Form OFF

There’s a Search Form widget, so if you want a search form add the
widget version to a sidebar.

Drag a Text Widget to the Header Ad Widget area and in the large text
widget form add your code.

Any HTML coding will need to be added to the text widget, if you
wanted something like

Address : I live here
Telephone : 000000000

With address and telephone in bold you’d start with something like this:

<strong>Address</strong> : I live here
<strong>Telephone</strong> : 000000000

This is on my list of features to add to Stallion in the future, so
rather than building a text widget have a widget where all the
formatting is built in.

Or you could create a custom header image :-)

David