Digital BW, The Print

I am looking for some data recovery software. I lost a lot of images on an 
almost full 1GB card. After spending $75.00 on Data Rescue it appears it 
does not recover raw images. It did a great job on the jpgs, but the raw files 
would not open.  It wants to make the raw files a tiff and photo shop will not 
recognize them. I tried just changing the tag but that did not work.

Thanks

Steve