(I'm using a Dual 1ghz G4 OSX10.3.9.) Hm, I got fmorgan's Mac Converter and that fixed some of the png thumbnails, and I was able to get some of the files to work, but a little hit-and-miss, i.e., the Spacefleet Officer for V3 worked, except for the thumnails on the MAT files; the Sneaker Boots didn't work at all; the pngs for Sport Set for V3 worked, but it crashed Poser 5 when I tried to open them; the Combat Boots for V3 worked fine...I guess I could be doing something wrong, but I don't know what...--T