..Brett Ratner's still directing, though...From Variety:"Rush Hour" buddies Brett Ratner and Chris Tucker are set to reteam with New Line.The studio has optioned the rights to the book "Mr. S: My Life With Frank Sinatra," with Ratner attached to direct and produce and Tucker eyeing the starring role of Sinatra valet George Jacobs. The book, a dishy tell-all penned by Jacobs and William Stadiem, w…