How to burn a copyrighted dvd with nero?

how do I burn a copyrighted dvd with nero?

Normally the copyright protection is in place to prevent exactly what you want to do.

However, according to the US Courts, you have the right to make back-up copies of copyrighted disks for your own use. Its just when you "loan" out your back-ups, rent them or sell them that you run into troubles. But if its for your own use and you only make one back-up, then you can make a copy.

However, some commercial disks contain more information than the capacity of retail blank disks. Because of this, you will need a helper program to "shrink" the content to fit your back-up disk.

http://www.dvdshrink.org

This freeware program can assist you in making your back-up.