Geoffrey,
try it with these pattern:
Code:
StoryToPrintableSub: s{http://www.lefigaro.fr/magazine/(\d+.MAG\d+)\.html}{http://www.lefigaro.fr/cgi/edition/genimprime\?cle=$1}i
StoryURL: http://www.lefigaro.fr/cgi/edition/genimprime\?cle=\d+.MAG\d+
I haven't tested it, but I don't see why it shouldn't work. I just had a look at your code; StoryURL must match the print URL, not the original URL!
Greets
Alex