Fifa doen'ts install with backup

[fortune2006]

Hi,
I just bought Fifa Football 2004 yesterday, tried now to make a backup CD. Worked fine with nero.

But: Now I tried to install it, of course from the backup (otherwise the backup would be senseless), doesn't work.

Put CD 2 into the (I don't know how it's named, I'm in fact German)

Now I'm sitting here, with 3 CDs backupped, an this backup doesn't work.
But I know my little brother, and how easy a cd ist destroyed, and I would prefer to have a !working! backup.

I hope you can help a noob

Thanks