It doesn't make a difference. I've used my various Vickys and Mikes from the Poser 4 runtime directory in Poser 5, and they seem to be fine (clothes included), and they render without any problems that I can see. I have other problems, to be sure, but not with them. :) Now if you haven't upgraded to the newest patch, when you save and try to reopen the file, Poser 5 may have problems finding the textures in the Poser 4 files but I think (and someone will correct me if I'm wrong, I'm sure) that has been resolved with the newest patches.