How do I convert a .duculture file containing many shapes to a .dupoly file?

To convert a culture polygon into regular polygon, see How do I convert culture polygons into regular polygons.

1. Insert Header information at the top of the file e.g. copy and paste from another file.
2. Insert a space or indentation before every row of X/Y coordinates.
3. Insert the word "points" between every set of X/Y coordinates, dividing each shape.
4. Remove all other blank rows in the file.
5. Save this file as .dupoly.