I have a Sony VAIO with a Mobile ATI Rage video chip, XP Home, 512M RAM, 1.3Ghz Athlon, 100M hard drive, 1024x768 display. Photoshop usually crashes after a few minutes of use. Lightwave Modeler crashes if I try to use an image as a backdrop. Poser 5... well, is Poser 5. Poser 4.03 has never crashed at all. I used it to make a number of images... a good 3-4 hours and numerous renders... not one crash. Just be sure you plug the latop into the wall... running any 3-d program off the batteries will drain them real quick!