Lyne,

It is most emphatically NOT necessary to be running 64 bit in order to use Vue 6.

I am running V6 Infinite build 291050 on an Athlon 3000XP with 1.5 gig ram using XP SP2.

I use Poser 6, however I don't use the Poser shader trees as they are a known resource hog.  I also don't use re-posing within Vue for the same reason.

Yes, it slows down somewhat occasionally, but I can live with that if in exchange I can use spectral atmospheres & clouds, painting with eco-systems, displacement materials, greatly improved rendering engine etc etc.
It is a great improvement on V5, and more than worth the effort to get it running in a stable fashion - IMHO!!!!!  :-)

Bernie