Make a new Finder window open to the same directory as the current one.

duplicate-finder-window.applescript

(*
Duplicate current Finder window
Author: Barry Els
Version: 1.1
*)

try
	tell application "Finder"
		set this_folder to (the target of the front window) as alias
		
		set theTargetWindow to front window
		set {x1, y1} to position of theTargetWindow
		set {bx1, by1, bx2, by2} to bounds of theTargetWindow
		
		set newWindow to make new Finder window to this_folder
		tell newWindow
			set bounds to {bx1, by1, bx2, by2}
			set position to {x1 + 20, y1 + 20}
		end tell
	end tell
end try