Bring water to boiling in pot. Add crawfish Seasoning bags, half of the salt, and half of the ground red pepper; stir to mix. Add potatoes and cook for 15 to 20 minutes or until almost done; remove potatoes from pot. Stir in remaining salt and pepper, and add basket of crawfish. Squeeze the lemons over crawfish, then add the squeezed lemons, onions, and corn to the pot.