A nude Posette and some hair is not much for any machine to choke on... When I installed Poser 5 on a 2.2 GHz, 512 Mb machine with Win XP, I could easily handle half a dozen clothed and hairy millenium figures (Mike and Vicky). The only significant difference from your spec is the processor speed, which I think is less critical than the RAM and basic OS architecture in this case. It must have been something weird with that machine... (BTW, I'm up to 1 Gb RAM now, and Poser 5 runs even better!)