Backup of Acura / Honda Navigation update 4.81 white disk (USA)



I wanted to make a backup of my $200.00 update disk and so far have treid. DVDFAB6 Clone, Imageburn, and Nero 9 Copy. None of them will work even though they say they are sucessfully copied. I am using Verbatim +DL disks. Anyone had any sucess doing this?