Do this - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code.
And then you'll see the title part (About Administrator) is in the memberinfo_profilefield_category template. You can write a condition in there based on the $id (I think) and put something before the fields:
HTML Code:
<if condition="$id == 'aboutme'"><dt>xx</dt><dd>yy</dd></if>
I didn't style that at all. You'll have to do that.