Well they were hamstrung by the Kwagga Smith red card. If memory serves, they actually outscored the Crusaders in the second half despite being a player down. But by then they had too much to do.
I honestly think they can do it. Hopefully Angus Gardner has a good game. If the Lions don't butcher chances like the Sharks and Hurricanes and the Crusaders don't convert every chance they get into points...