Jeep relies on the marvels of high-tech medical imaging to reveal what's on people's minds. "Research has shown that people use less than 10% of their brain capacity," the ad reads. "What occupies the rest?" Apparently, a certa in sport-utility vehicle. The ad is one of six new executions Bozell, Southfield, Mich., created for Chrysler Corp. Copywriter: Jason Bergeron. Art director: Chuck Meeker.