For years, a South Florida nursing school operator sold a simple proposition: Skip the schooling, buy the diploma, become a nurse. Nearly 3,000 people took her up on it. On Monday, the scheme caught up with her. Carleen Noreus, 52, of Plantation, pleaded guilty to conspiracy to commit wire fraud and conspiracy to commit money laundering following a two-week trial in Fort Lauderdale. She had taken her chances before a jury rather than accepting a plea deal, changing her mind mid-trial, a decision