I believe they have different threads, I couldn't get mine to work and used a gear puller. Harris' site has some pullers for TA cranks which I think would work on the Nervars, #393 on this page:
http://sheldonbrown.com/harris/tools...ket.html#crank
They don't mention Nervar cranks so I'm just guessing, maybe someone knows forsure.

I'm thinking of putting my Nervar on my UO8 and putting a triple on my Grand Jubile, although at times I'm wondering why I'm venturing into French bikes.