Random thought of the day.... I've seen a few CDs around where the manufacturer has deliberately included errors on the disc to make piracy more difficult - which is a noble enough thing to do, but a bit of a pain in the butt when you want to make a legitimate backup copy of a disc :-( Has anyone come across tools (Linux preferred, but I could stomach Windows if I had to!) which can duplicate such discs and produce errors in the output at the same block as the input? (I assume any software on such deliberately-crippled media would check for the presence of known errors at install / run time) cheers Jules