If you use XP do this for the memory issue:
Go to control panel
then system
Then advanced
then performance/settings
then advanced (again)
then virtual memory/change
then click custom size.
I find i can give Poser the added kick it needs just by increasing the initial size a little bit and then I increase the maximum size a tad also.  Click set and that should do it.  You might have to restart your computer...sometimes I do and sometimes I don't.

PS - anything I tell you to do to  your computer, you're doing at your own risk so proceed accordingly! :biggrin:

My idea of rebooting is kicking somebody in the butt twice!