MLB Extra Innings

Is there a way to set up my Genie to record only the CUBS BROADCAST for the Cubs games, Chnl 664? I've set up the team to record but I usually get the visiting teams broadcast and not the CUBS broadcast of the game, which is not what I want to watch. I would prefer that it automatically records channel 664 for every Cubs broadcast, and add 1.5hrs to the end of each recording.