Quote - *...*f you do have a 64bit system and 64bit cpu (I guess you can't have one without the other) ...

You're half right or just not clear enough :), you can't have 64bit OS on 32bit CPU, but you can have 32bit OS on 64bit CPU (at least with desktop CPUs, server CPUs can be compatible only with 64bit OS and apps). On 32bit CPU you can have only 32bit OS.

If computer is strong enough, I recommend some dual core CPU, or better, and 4GB of ram, I would suggest upgrading to Vista x64, even Poser 7 can benefit a little from it, If you have 64bit OS P7 can use up to 3GB of ram, on 32bit OS max is 2GB. Also, if you render animations. On XP poser was caching textures for every frame of the animation, on Vista only on first frame, so on XP I got about 3 minutes per frame, on Vista I got 3 minutes on first frame and 1,5 on following frames. Same computer, same Poser 7 installation (I have it on external HDD). I guess vista has better caching, that's why most complain vista uses too much memory, it caches a lot of stuff, if you need it again it's already loaded, if not it can be easily disposed off, what's the use of lots of memory if it doesn't get used :). Only problem I had with Vista was getting used to some stuff that's now done differently, and the only thing that still irks me is boot time of Vista x64. It takes about 4 minutes from the time I press power button, to the time Vista is fully loaded. Except for that (PITA) everything works fine.