PBLTWO,
Here's one of the website's that may help answer your question. There are several out there. There's also been a lot of discussion on the subject on these forums. Although Sound Choice disagrees, it is generally considered ok to make a back-up of a disc you own, for your own private use.
http://www.karaokeantipiracyagency.com/faq.shtml
Hope this helps,
George