The AP reports: The Detroit Pistons are back to their old mainstays and back to their old, winning ways. Richard Hamilton had 25 points, Tayshaun Prince scored 15 and each hit a 3-pointer in the final 80 seconds to help the Pistons beat the Celtics 105-95 on Sunday. Hamilton also had nine assists in his second straight start since Allen Iverson returned to Detroit because of a stiff back. “You can tell they’re playing the system they played before Iverson got there,” said Celtics forward Paul Pierce, who scored 26… Glen “Big Baby” Davis, starting in place of the injured Kevin Garnett, scored 18 and Pierce played all but 18 seconds as Boston lost to an Eastern Conference opponent at home for the first time this season.