if you want a bit of white space between the middle area and the footer, you can do it but it will take some work. Since teh header, middle and footer are all rows of a table, one way is to add a new row before the footer
in ato->Style & edit FOOTER->Footer: Content add the following as the first line
<br /></td></tr><tr><td id="footer2">
this will create a new row, but you will notice that your text in this area is no longer styled.
You need to use FireBug in Firefox and examine the new row, copy all it's css and put it in the CSS Inserts with the ID 'footer2' insetad of 'footer'