Poser runs GREAT on 2k... I had a dual-boot with 2K/ME before XP came out, I used ME only for gaming, & 2K for everything else. Also, Poser ROCKS hard on an Athlon XP2400+, is what I upgraded to from a 950 Duron about 6 weeks ago :o) Only advise I have is this, make sure the motherboard can support the XP2400+, & flash your BIOS, to prevent system hangs. Hope I helped a little, Thomas