I have been experimenting on 2 DVD burning softwares. They are Nero Burning Rom 6 and Alcohol 120% v1.9.2 I heard from my friend that Nero isn't really reliable for burning stuff. Therefore, I checked all my DVDs using Nero's Toolkit; CD-DVD Speed for checking the Disc Quality. Turned out that all the discs I burned have very high PI Errors and PI Failures. Thinking of a solution, my friend suggested converting the files into ISO images first, then burn them using Alocohol 120% for stability and reliability. Following his advice, I converted them into ISO using Nero's Image Recorder. Then I used Alcohol to burn the discs. But it turned out the same. PI Errors and PI Failures very still very high. Why is this so? I'm using TDK 1616DLN DVD-burner. The medias I use are TDK's DVD+R; using RicohJpn dye and Fujufilm's DVD+R; using TY dye. I burn the DVD at it's labelled speed. I have at least 8GB of free space when I burn my DVDs, without multi-tasking. Any better solutions of burning a DVD of high quality? Please help! Thanks in advance.