Tirjasdyn, The smaller Runtiem might help - certainly with opening libraries. One thing I noticed with upgrade to ProPack from Poser is that new libraries open slower. A lot slower the first tiem as it builds .png files from the .rsr's - as ReadMe warns about. But is still slower afterwards - similar to Poser 5. I wonder if the code to verify the presence of .png files is the cause... Still confused about the dial performance difference though. A 1.4 vs. a 1GHz doesn't seem enough to account for it. Could be memory (mine's SDRAM 133). But still doesn't seem enough. Could it possibly be XP versus Win2K? These are of course very similar. But if Poser 5 is forcing Windows to effectively do a inter-task context switch and pass data values bacl and forth - becuase of the separate window for the parameter dial - could there be a perfomance difference in XP with respect to task switch time? Perhaps one of the current Windows programmers coudl shed some light?