not sur eif Poser works with XP64 or not, but it will address much more ram...so, you can bulk up tyour physical memory, which would allow a much larger scene to be built. large as in memory used....which would in turn speed the whole thing up as it doesn't have to whack the hard drive.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854