Hi, you said you have 4 gig ram, what os? if 32 bit windows and you've tried a hack to implement more than 2, it's at your own risk, Microsoft never officially supported that option as it was only an inclusion for developers who were told the risks and knew how to implement it properly. As such all your system memory could easily be unstable  and unreliable. Poser 7 is large address aware and can use more than 2 if available but only safely if the os truly supports it. If your on a Mac or Win 64, disregard this :)