Hi. I'm using an iBook G4 OS X Version 10.4.11. I have a CD that has medical images on it (ultrasound photographs); I've put it into the CD drive and it comes up under "Finder" but when I click on anything, it comes up with "There is no default application specified to open the document "DecodJPG.dll" and gives me the choice of "Cancel" or "Choose Application". If I select "Choose Application", no matter what I choose, it doesn't take me to anything. Alternatively, some of the files I click on automatically opens iPhoto, which looks like it's going to import the photos, but then I get the following message: "Unreadable Files: 1 The following files could not be imprted (they may be an unrecognized file type or the files may not contain valid data)." Is anyone able to tell me why this might be happening and what I am able to do about it? I'm not very technical, so best to give simple answers please! Thank you.