Since AutoCAD 2009, we have had the ability to export a single layout to a new model space drawing. (CAD Tip No. 3100 is all about this process.) This routine by Amir Hossein Sattarian allows you to export multiple layouts to individual DWG files automatically. After you load the LISP file, run the command LXA and the LISP code will do the rest. Each layout will be exported to a separate DWG file. The DWG files will be located in a new subfolder of the current drawing's folder named "Layouts." The LISP code actually writes a script file, then loops the calls to the built-in ExportLayout command.