I found this issue entirely confusing. I thought at one time that Poser 5 was supposed to be written from scratch, and that we wouldn't get any of that crappy Poser 4 code. Or at least, I thought we wouldn't get any Mac code since there is Mac version of Poser 5!? I renamed the file in question, and it doesn't seem to have affected the loading time. But then I use external Runtimes anyway.