It is a large file XP, but that is because of all the HELP videos, once they are gone it is about the size of 98, I love it, and if it wasn't for LaurieA, and her brave soul to test some software, I don't know, but I am glad I switched, like I said more stuff works for me correctly in Poser in XP then any other OS. I LOVE IT, if anyone runs into problems, XP seems to correct all of it. And I am using Poser 4.03, that is it, I have Pro, but don't seem to need it now. Sharen