I use Nero 7 Ultra Edition to back DVDs up. I have a copy of Roxio somewhere if that's the problem. You can see the DVD player here: http://www.audiovox.com/webapp/wcs/...10001&storeId=10001&productId=14828&langId=-1 I can get backed up DVDs to play in all of my other players except the Audiovox in the car. Any ideas?
If your player is capable, use +R discs, and booktype them to DVD Rom. Here is some info on booktyping: http://www.k-probe.com/bitsetting-booktype-faq.php Also, if you'll read all around these forums, you'll find that most people here consider Memorex to be the worst media you can get. Try Verbatim or Sony, from local stores. If you buy online, try Taiyo Yuden media. Good luck!
