RAM Doubler was great for keeping multiple programs running simultaneously, particularly when the programs were not too big. Doubling real physical memory, as inyerface suggests, works well; I even had some success with tripling real physical memory. The issue was to keep the total of the RAM used by the operating system plus the RAM allocated to any one application to less than the total real physical RAM; otherwise performance degrades dramatically. The limit comes in that RAM Doubler maxes out at 256meg Virtual RAM. And Poser really likes much more than the 80-90meg that are left over after allocating inside 128meb real physical RAM after OS9 takes its chunk. So adding real physical RAM is the only practical way to get lots of memory for Poser. I allocate 192meg to Poser, and it seems to perform well enough for my relatively simple needs. - JimW