Get rid of Nero 6 and start using Record Now deluxe - it works a treat everytime. Have you tried playing the Nero 6 creted disc that gets the error. I had these errors quite a bit with Nero 5.5.10.42, but the DVD Disc was still read by the palyer and still worked just fine. This may be the case with you.
Yeah, like I said, it gets through about 1/4 to 1/2 the data, then quits. And as for record now max, if it doesn't work, I don't have the cash to blow on another serial number. Oh well I guess.
I mean lower it by say 50-100MB - you will stil have 4+GB. Also, if you keep experiencing problems with nero, either download the patch from www.nero.com or change software.