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O'Gara - who has scored in his last 80 successive Heineken Cup matches and is the only player to top 1,000 tournament points - is just one of the eight Munster players who represented Ireland in the recent RBS 6 Nations tournament the Irish province can call on for their Amlin Challenge Cup debut.
"Our discipline will have to be almost perfect because on the other side there is a world class goal kicker who will punish us" said Estebanez, who won his fourth cap as a replacement for France in last month's RBS 6 Nations clash with Wales at Stade de France.
"Although Munster did not make it to the Heineken Cup knock-out stages for the first time since the 1998 / 1999 tournament they are still one of the greatest clubs in Europe.
"It is both very interesting and rewarding to face such teams - though it was a bit of a surprise to find out we would play against them in the Amlin Challenge Cup - and their players will be all the more motivated to win the competition.
"As for the Brive players, we are super excited to take part in an Amlin Challenge Cup quarter-final against Munster and we can't wait to face them.
"It is a first for us at Brive to face Munster and it's going to be a fantastic experience for our players who will be able to measure themselves against some of the best in Europe - and even in the world - since a lot of the Munster players play at the highest international levels for Ireland and the British & Irish Lions.
"They have great calibre players like O'Gara and Paul O'Connell who have so much experience of these European encounters. It'll be tough for us but we've got everything to gain in that game.
"The key to beating them is simply to play a perfect game. We will have to be aggressive, because we will have very strong players in front of us, and we won't be able to afford mistakes.
"However, we will enter the field without any sort of complex and give it 100 % because we want to go far in this competition.
"Taking the game lightly is out of the question. We won't be spectators of our own game and, on the contrary, we will take our chances.
"It's true that the most important thing for us is to avoid the relegation zone in the Top 14 and that is a priority at the moment, but we always have the ambition to return to the Heineken Cup and winning the Amlin Challenge Cup would open that door for us.
"That would be the best reward to finish our season - what a gift for the players and the club!
"And it is certainly hugely exciting for our fans to see us face a team like Munster and the atmosphere should be amazing considering the masses of travelling Irish fans that will come over."
