Initiative: Preschool for all kids in the state ROB REINER TO LAUNCH PUSH FOR '06 BALLOT By Luis Zaragoza Mercury News Motivated by studies that suggest prepping children for kindergarten is key to their future academic and personal success, film director Rob Reiner planned to announce today that he is launching a campaign to make free, half-day preschool programs available to every 4-year-old in California. ``We've spent a year discussing this -- in a sense, doing what any legislature would do,'' said Reiner of the committee of labor, business and education experts that helped shape an initiative he hopes to...