FrameMaker has two basic ways of importing images: by reference or by copy. If you import by reference, there is a link between the FrameMaker document and the image on disk. When you do a list of references, it will show you the path to these images. When you import by copy, the entire image is copied into the FrameMaker document and you lose the reference to the original image file on disk. Based on your description, I am not sure what the issue is with your files, but this information may help.