Hello all

, I did a photo shoot the other day only to find that some of the photographs that I had copied over from one of my CF cards, had corrupted them , all the files seem to be intact and the right sizes, they wont seem to open in any programs, such as Aperture Iphoto, Nikon Capture, I did had a little amount of joy when I used my dads pc a freeware programme I downloaded managed to produce some 480-640 tiff previews from the files but I need to recover the full res versions, is their anything anybody can suggest so I can repair these corrupted NEF Files
any help would be much appreciated