I want to wear my hair down falling past my shoulders. What is the best veil for that. My wedding dress is going to be simply decorated with a train.

Probably a chapel-length or fingertip veil would work the best. Since the dress is simple, the headpiece may be decorated with lace, flowers, pearls, beading, or whatever you want that will complement the dress. Try them both on at the same time to refine your look. Also see the Great Ideas article on Hair in EZ Wedding Planner, which details hair styles, veils and headpieces.