There are many methods of reading the Marseille pips. This thread contains links to a number of different methods, which you might find useful to have a look at: http://www.tarotforum.net/showthread.php?t=158719
I have never found it helpful to transpose RWS meanings onto the Marseille pips, because the systems are so very different. I would suggest discussing this with your reading partner before reading, as I imagine some Marseille readers would not be comfortable with this approach.