Hi anony, welcome to cd freaks
In future when saving the image of quality scans in nero click the floppy disk icon in the top right of the window and save it as a .png
I only say this because png will result in a smaller file than jpg and is much much better quality.
Then you can upload the images to cdfreaks using the "manage attachments" button.
The scan isnt probably isnt bad enough to affect the data now but it might do a few months down the line. I agree with agent009 that you should consider making a backup copy.
Hope i helped.