CTV scored a touchdown with Sunday`s Super Bowl XLV, scoring an overnight, estimated audience of 6,537,000 viewers. That`s up from last year`s record overnight tally of 6,025,000, also on CTV.The pre-and post- Super Bowl spots were also huge for CTV, with 4,377,000 and 4,517,000 tuning in to each (although the post show trophy presentation, which CTV barely