Hi, I have got a Power Mac G5 running Mac OS X 10.5.8 and I have upgraded the original Pioneer optical drive to an NEC one that supports dual-layer DVDs. I'm trying to make a bootable Mac OS x 10.5 DVD and I'm using Verbatim 8x dual-layer DVDs and the disk utility says burn failed! I have rad people having problems with other branded dual-layer DVDs but Verbatim branded ones work for them. What is going wrong and what is the solution?