Damaged Photoshop Files

I just recovered from a HD crash. I can recover my Photoshop files
from the damaged HD but most are unusable by Photoshop CS2. I have
found a few demos of programs designed to recover these files. They
work quite well but the licenses for them are expensive. (Around
$150). The demo versions leave a watermark on the print.

Does anyone know of a freeware or reasonably priced program that will
recover damaged files?

Thanks
Sincerely,
Stuart Pedazzo.....but you can call me Stu!
.