In a medium bowl, cream together the shortening and sugar. Stir in the eggs, vanilla and molasses. Sift together the flour, baking soda, cinnamon, nutmeg, ginger and salt; stir into the molasses mixture. Shape dough into a log 2 inches in diameter. Wrap in wax paper and refrigerate overnight.
Preheat oven to 350 degrees F (175 degrees c). Grease cookie sheets or line with parchment paper.
Unwrap cookie dough, and cut into 1/4 to 1/2 inch slices.
Place on prepared cookie sheets and bake for 10 to 12 minutes in the preheated oven.