I ran Poser 5 and Poser 6 on a Dell Inspiron 8200 1.8 gig processor, 512 DDR ram, and  a 40 gig hard drive for about 2 years.  For the most part it worked ok.  Because of the lights in Poser 5, some basic 1 figure scenes took an hour to render with Firefly, and longer if I was using raytracing.

There were some that I had to render in pieces and put together in post work. 

But what can I say, it was a crappy Dell and I strongly suggest staying away from their stuff.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi