(WinXP, Athlon 1.4GHz, 512MB RAM) I just tried a comparison between Pro Pack and Poser 5, in loading DAZ's Vicki with a texture map. Tried a few other loading tests also. Consistently about 10% slower in Poser 5 using identical (uncompressed) files. For quick test renders, in Render Options, switch to "Poser 4 Renderer", and turn OFF "Cast Shadows" (obviously, "Anti-alias" should be off as well).