By Lucas Shaw NEW YORK (TheWrap.com) – Before landing the role of Larry David's wife on "Curb Your Enthusiasm," Cheryl Hines was an assistant to Rob Reiner. Now that she's a TV star, she has had her share of assistants, including one she'll ask to do anything — and he'll do it. "There is a really gritty, unglamorous underbelly to show business called the assistant world," Hines told TheWrap. From that dynamic comes many stories that inspired Hines and her friend Rachael Harris to create "We Need Help," a show about Hollywood's less savory side, produced by Principato-Young and Vuguru. …