Quote - They speak of "hard disk caching", presumably to benefit those who lack RAM.
I'm hoping that's an option and not a default, 'cause I want my 4 gigs of DDR2 to do the memory work, NOT the virtual memory.
Unless I'm misunderstanding it, that is, and if I am, please correct me. :)

Also, I'm assuming Poser 7 will be 32 bit. I know a 64 bit system can run it fine, but can a dual or quad core CPU even work properly in a 32 bit environment?

If Poser 7 is only 32bit application then it won't use 4GB of ram. 32bit windows can allocate only 2GB of ram for an application (without "dirty" hacks). That includes virtual and real memory.
Here's some info about 32 vs 64 bit and memory http://en.wikipedia.org/wiki/64-bit#Memory_limitations

That's why I hoped that Poser 7 would also have 64bit version, even more than multithreading support. I'd rather have slow renderer, than faster that whines "Out of memory" like current one. But maybe that new memory management will fix that.

Luckily dual/quad core doesn't have anything to do with 32/64bit. It's the same as multiprocessor computer from 10-15 years ago when most operating systems were 32bit, or even 16bit. So they work properly in 32bit environment, only thing that's required is that operating system supports it, and Windows XP (and 2000, and other based on NT core) do.