[SpookyZalost]

brian, are the discs heavily scratched?
technically you have the serial number and the discs so you can legally make a backup if you want, even up to downloading it and burning the discs... as long as you still have your physical copy with the serial.
in case that helps ^_^

also, though this doesn't always work... sometimes you can put the serial number into origin and get a digital copy

edit:
Disclaimer: I am not advocating piracy, I'm advocating legal backups which is part of the consumer protection act which was revised to include this as discs tend to get used up over time and you shouldn't lose your game just because of normal wear and tear since you paid for it.