I'm fairly new but learning more every day. I used Nero CD/DVD test to run a quality test on my DVDs. I had some that registered a 35-45 quality score so I decided to reburn. I use DVD shrink and Nero to burn. I only burn at 4x. I think I might have had the deep analize and the error thing unchecked on those poor ones. When I redid the DVDs (which are a little scratched) with the quality settings on I still get not great scores. My hardware is: 2500+,MSI board, 450w power supply, 1g ram, 1648 AAP with 1.07 firmware (flashed back from TDB firmware for testing), 3500A with latest firmware .18 stuff. Using DVD shrink and reauthoring. I think my 1648 might be ripping too fast. Also I'm using junky media, Legacy stuff that I ordered with my 3500 because it was cheap. I think that very well could be the problem too. I want to use up all of it so I can get better stuff. Will prolly get riteks next or dual layer if those r affordable when I run out of this stuff. Local Walmart has the Verbatim Movie Discs 5 for $6 so i was gonna get those to test that out and see if its the media.