Maybe this program can help. CDCheck
Short description (details): CDCheck is utility for prevention, detection and recovery of damaged files with emphasis on error detection. It offers readability verification, creation and checking of MD5, CRC-32, SHA... hashes (in file formats SFV, MD5 and CRC), extremly efficient file compare (faster than in most other programs) and recovery. CDCheck can be used on all files visible by the operating system. This means all files that you can see in Windows Explorer (CDs, DVDs, disk drives, floppy disks, ZIP drives, USB keys...). Apart from this it also works with audio CDs and provides information about inserted CD/DVD (manufacturer, media type...).
You do have to register it but it's a free registration. I've used it to recover some files that were corrupted on one cd i burned so it may help.