I have GIMP, I do not have Shotophop. I know that PSD files can be opened in GIMP (right?), but the particular files I'm trying to open come up with the error:
Error loading PSD file: Unsupported colour mode: CMYK
So... erm.... what next? Send the file to someone else to change the colour mode, then send it back? Download something for GIMP that will make it work?