The MAX Pro-Pack installer isn't very user-friendly as far as options are concerned. I can't say that this WILL WORK in MAX4 (since I don't have it), but you can try this trick: Rename your MAX4 EXE to 3DSMAX.EXE and the installer will "find" it. It also uses a simple TXT file to point to the PoserPP directory, which you can edit... After install, rename your MAX4 EXE to it's correct name...