I have both the subway and the gas station, which also has some very large maps. I can fully load either -- or both -- and have no problems. Multiple figures added in, a relatively cluttered set, no problems. I don't get any errors, even with all the textures at full size. But I don't have Poser 5. However, since there are still so many weird and random bugs with Poser 5 that can't be duplicated on every machine, it could just be another quirk. I've tried running it on two different 2 ghz machines, but we're working with the same 512 of RAM. I wouldn't think that the processor would make THAT much of a change, though. Win XP machines. Something else ... are you having any other weird system hiccups? Blue screens, other errors? My laptop regularly choked on Poser when I first got it. I have pages of exception errors logged. Turned out to be a bad RAM chip. I hate dragging this up again, but I utterly adore kurokuma's work and haven't had any problems, and the geek in me wants to try to figure this one out.