That's part of the guaranteed GUI compatibility. What, the Windows version doesn't do the same (like InstallShield does)? Praise hallelujah, I have seen the light and carefully reread the Poser MacInstaller docs. The problem I was having was with those clowns who refuse to package .BUM files with their archives -- PMI doesn't automatically translate them for you (which is a shame considering the author was one of the first people to figure out the .BUM file format, which we just learned here is merely the Windows .BMP format under another name).