Quote - When the computer starts up, at least 512MB of memory is eaten up by the operating system. That leaves about 1.5GB RAM for program code and data.

Even if the 2 GB limit were general, it wouldn't explain this.
As I mentioned in my posts, Poser crashes & burns when the overall  (Poser + Windows) memory usage is only 1.7 - 1.8 GB (Poser taking 1.5 GB, Windows 0.2 - 0.3 GB). That leaves a 0.2 - 0.3 GB headroom.

BTW, sorry, forgot to make that screenshot yesterday. I had big server problems at work till late in the evening, and when I finaly got home I had completely forgotten about Poser stuff...