In reply to walts4:
> Sure the traverse is the easiest route up the Petit ...
Well yes - but that's because the 'Traverse' takes the Voie Normale up the Petit Dru, then the linking 'Z-Pitch' to the Grand Dru, then finishes by descending from the Grand to the glacier by abseiling and down-climbing.
So the OP is asking for info on the Voie Normale up the Petit Dru.
I have done all this stuff but too long ago to remember any of it; however the description in the AC guidebook worked okay for me.