Recovering Corrupt JPG File

I was cleaning out the closet the other day and came across some old, circa
1992, floppies with a program called PhotoFinish. I have no need for the
program, a photo editor, but it did come with several floppies worth of JPG
images, mostly photos. After copying the images to my hard drive, I used the
Browser in PSCS to get an idea of what they looked like. A few, maybe 10 out
of the 200, were not viewable. If I tried to open the image, I received a
message that the file was "truncated or corrupt". I tried several viewers
with the same result. Does anyone have any suggestions on how I might
recover these files?

Thanks!