Making a copy of a bootable CD

[rbanzai]

I just got my Diskwarrior CD and wanted to make a backup. It's a bootable CD (That's the only way you can use Diskwarrior) so in SuperDuper I made sure to copy all files and copied from the mounted CD to a disk image. Then I used Disk Utility to burn the disk image.

Doesn't boot.

What procedure should I use to make a genuine copy of this CD? Being bootable is part of it as this backup disk is useless if it isn't bootable.

Thanks