Davit Kubriashvili, Christian Loamanu, Joe Van Niekerk and Gavin Henson all scored tries while Jonny Wilkinson kicked 18 points in an impressive win.
Saint-Andre said: "It was a good result for the confidence and psychology of my team in preparation for that game. We played some good rugby, scored five tries and that is a big positive ahead of the quarter-final.
"That game against Perpignan will be a completely different game and a different atmosphere in Spain. It will be a war against Perpignan.
"But it will be the first time in the history of our club that we have competed in the quarter-finals of the Heineken Cup and it will be a fantastic moment for us all.
"We qualified top of our group and this is the next step. Of course we are also fighting to win the French league as well."