Depending on how damaged the disk was, I doubt the image you have will be acceptable to you.
If the disk is very important to you. I would take it to a store which does scratch repair on dvds/cds. Some audio/video/film developing places have this service and most of the time, only charge a small fee. So if the original disk is worth more than a few dollars to you, I would recomend getting it professionally repaired.
Keep in mind that all DVD drives have different reading abilities. So even though your drive cannot fully read the contents of the disk, another model might. If possible, try other drives. Although, depending on how extensive and sever the scraches, no drive will be able to read it if they are really bad.