Hi Welcome to Sitepoint
I wasn't able to ascertain exactly what you wanted so if the above post is not what you were looking for then please provide a drawing or at least the html and css that you are using.
It is most likely that you shouldn't be using absolute elements anyway and DW cannot be used to lay out pages in CSS unless you know how CSS works and what properties to use for the job in hand.
Usually pages are laid out with static positioning (no positioning) and only small amounts of absolute positioning where needed. Horizontal alignment is handled by floating elements.
If you have a drawing of what you want then we can tell you the best way to do it.:)