1. Click on the below link 'REPAIR DISC 3, Tooth Atlas v.4.0, 3 CD-Rom set' 2. Click 'Save' to save the .zip file to your desktop 3. Once download has completed, 'Right-click' the file to extract it 4. Open the folder DISK3_V4 on your desktop 5. Copy all the files (Data3.cab and Data21.cab) to burn a new CD. This CD will replace your old/damaged disc 3.

file:

REPAIR DISC 3, Tooth Atlas v.4.0, 3 CD-Rom set (416 MB, you must have a CD-Rom burner to create the replacement disc.)