This may not help but the installation worked fine for me. I had, some time ago, removed P4 and P5 from my system (total faith in P6, man, what was I thinking?), AND had installed SR1 when that service pack came out. Found my Poser installation at C:Poser and the update went well. The software does seem to load faster but I've not tested anything else. Must say though that I never did have too many issues with the original release. The reflection issue was the only problem that kept me from completing a project. Best Wishes All, Rance