Swap Magic and back-ups

[zmeu]

So...after my dog totally ruined my Destroy All Humans DVD I decieded to backup all of my games use swap magic to start playing the backups and keep the originals away from the dog.

The problem is Swap magic 3.whatever says that all of my disks (CD or DVD) are not valide PS2 disks.

I used Nero to make backups of the disks.
Is there another program I should be using to get them to work?

I have heard that Alcohol 120% and DVD Decyphter can copy PS2 disks.
any recomendations would be helpful

Thanks