Traille has played only seven minutes at fullback and Beauxis has started just three times in his nine internationals, but their coach remained confident.
"With Lionel and Damien, we have two international class boots," Laporte said.
"When one is not there, the other can be. And if they are both there, wonderful."
France will look to use Traille and Beauxis's tactical kicking to play a territorial match by pinning the All Blacks deep in their own territory, giving Beauxis the opportunity to kick goals.
They will also aim to put pressure on the New Zealand lineout, one of the few areas in which the All Blacks have proved fallible.
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"If they do keep kicking to our back three we will run the ball. We have no fear and will back our instincts."
Dan Carter,
New Zealand flyhalf |
Meanwhile, New Zealand signalled their attacking intent by omitting Doug Howlett, record try-scoring winger, and opting instead for the occasionally erratic brilliance of Joe Rokocoko and Sitiveni Sivivatu.
Rokocoko and Sivavatu could be found out under the high ball but are also more likely to break the line with their explosive running.
"The French pride themselves on their lineout and will use short and long kicks," Dan Carter, New Zealand flyhalf, told reporters.
"They have good long kickers and will hope to bring their lineout into play.
"If they do keep kicking to our back three we will run the ball. We have no fear and will back our instincts."
New Zealand changes
The All Blacks, deservedly tournament favourites although having not won the Cup for 20 years, were not really tested in the pool stages giving coach Graham Henry plenty of opportunity to experiment with various combinations.
As a result, Kiwi selectors decided that Conrad Smith had not done enough to seal the outside centre position, which has been one of the few problematic areas since former captain Tana Umaga retired two years ago.
To compensate, Mils Muliaina has been moved from fullback and will play alongside Luke McAlister in midfield, with Leon MacDonald taking over in the number 15 jersey.
The early forward exchanges are likely to be extremely physical and will provide a true test of New Zealand's pack after they enjoyed a relatively easy time in the group stage.
Keith Robinson, an uncompromising lock who relishes the close combat, has been selected ahead of Chris Jack in an eight who will come up against one of the world's most experienced and battle-hardened packs.
"If you look at the French ethos about rugby, much of it is about the scrum," Carl Hayman, All Blacks tighthead prop, said.
"There are plenty of great scrummagers around France.
"In any game getting early pressure in the scrum is key. There is going to be a lot of pressure on Saturday in the set-piece."