There are various ways to target specific regions of the genome. The most exciting right now are the zinc finger nucleases that allow very efficient gene targeting in embryonic as well as somatic cells in mammals and non mammals. The French comp try to be original and work on a different kind of nucleases that can be manipulated to provide gene targeting. I have no idea why Monsanto decided to license this technology rather than the zinc finger nucleases. Maybe they are trying both to be on the safe side. Or perhaps there are no publications regarding zinc finger targeting in plants.