Recovering Overwritten .jpg files

[Stifle]

Hey everyone, got a problem here.

Is there any way to recover .jpg files that have been overwritten by other .jpg files with the same name?

So here is the situation, My wife came to me the other day complaining that some of the picture files that she uploaded to an online picture printing service (Snapfish) did not get printed as they should have....

Upon further investigation it seems that the thumbnails attached to a number of pictures in her particular folder do not "actually" reflect the picture that is contained within the file.

So basically after a bit of interrogation I found out that she had "organized" the pictures that she wanted to upload into a single folder. What I think happened is that when she started moving files from here and there into a single location, some of those files happened to have the same filename(due to the way our camera allocates the filenames), and while she was working away she just started overwriting the files that had the same name.

While investigating the folder in question I copied the entire folder contents into another folder - this corrected the thumbnail issue in the second folder (so that the thumbnails reflected the file contents) and allowed me to compare the two folders' thumbnails to see just how many pictures were overwritten. The number stands at 73 pictures, most of which were the only copies of pictures from the hospital during the birth of our first child.

So basically my question can again be distilled into a single sentence:

Is there any way to recover .jpg files that have been overwritten by other .jpg files with the same name?

Here is a little more background info,
-The drive(s) where the pictures were originally stored/erased consist of two WD 35GB Raptor Hard Drives in a raid 0 array

-The pictures may have been overwritten as long as 8-9 months ago, The Wife is not sure exactly.
-I do not think that I have reformatted and reinstalled windows in that time period....
-I have used Raxxco perfect disk 8.0 several times since then to defragment the drive however.
-I have all of the original file names written down if that makes any difference.

Any suggestions would be helpful. Thanks all