many CDr burners have error correction, just like a normal CD player has. This means that if you succeed to burn a copy protected disk, the build-in mistakes will be gone. A CDr copy of a copy protected disk is likely to run on a car stereo. Same goes for scratches etc. My own Joe Henderson - Inner Urge CD will not play on my machine, it get's stuck somewhere. I burnt a CDr and no more skipping. Of course this all depends on your CDr drive and on your machine.