Here's what I run Poser 5 on: 1.8GHz P4 processor, 512 Meg of system RAM, Nvidia Fx 5200 128Meg graphics card. I also have 2 hard drives which are 60 Gig in total, enough for now but won't be in the long run. My P5 works great with that but yes I would like to up my RAM to 1Gig or 2 but you certainly wouldn't see any benefit from having 4Gig IMHO. I'm sure there will be more for you on this one and again it will probably conflict with what I've said but mine works fine with this set up.

Injustice will be avenged.
Cofiwch Dryweryn.