Select the cell with "Buyer/Address"
Locate the border tool( in Excel 2003 it is to the right on the Format
toolbar; in Excel 2007 it is in the Font group on the Home tab). Click this
tool's launch arrow. Now select the "Outside Border" item (in Excel 2003 it
is third on the third row, in Excel 2007 it is the seventh item down)
Now your cell has a border around it
Note that the border tool nor shows a single square.
Select the four cells ( Jackson , Somewhere , On Mars, Opp Venus ) and
click the Border tool
This seems to give what you are aiming for
best wishes