Tobacco companies have reluctantly turned over a much fought-over cache of documents the State says shows the industry's deepest, darkest secrets. Now the files are in the hands of State and Blue Cross Blue Shield attorneys who plan to use them as ammunition in Minnesota's lawsuit against the tobacco industry. Tobacco company staff wheeled more than 100 boxes of confidential files into the state's minneapolis lawfirm to an audience of onlookers, lawyers and reporters. (sfx...squeaky wheels, boxes being thrown down etc) The tobacco industry fought hard to keep these files secret; they climbed a ladder of appeals to the U-S Supreme Court--and lost. Right now, these files are subject to protective order and aren't