Hi,
Which airport, and which terminal? For both Orly and Charles de Gaulle, you can find detailed maps of each terminal at
http://www.adp.fr ; I don't remember if their maps are also available in English, but ATMs are called "distributeurs de billets" in French.
If memory serves, to get to the ATMs you have to clear customs. However with a 2 hr stopover she should have plenty of time. I always clear customs and spend time in the public areas when I am in transit even for a couple of hours, because there are more interesting cafes and more varied services in the public areas.