Stamped?:scratches head: Have you googled yet? This is the story as I understand it...Industry Laser(which burns a finer..higher quality...can burn up to 9GB(DVD-9) on a single layer ..standard DVD. The price tag on such technology is still out of reach for the average Joe comsumer...so we have the best publicly affordable dvd burners...which at this time is only capable of burning 4.7 GB(dvd-5) on a single layer. The dvd itself (I beleive) would be just the same as a commercial dvd...but We the consumer are not equiped to Write(burn) with a $600,000 dollar DVD burner. DVD-9 DL is being marketed to consumers so that We can copy an entire 9GB movie to a 'homemade' burned DVD without 'compression' software like Shrink, REBuilder, Remake, etc. No Compression= no quality loss. But there's still the 'layer break' which can cause some players & burners to 'hang up'. I loaded my copy of DVD REBUilder 1.3 onto computer ...and had a look-see, you're right(or I hadn't enough BEER) it looks like it will take a season(or two) to explore the finer points possibilities of that program. I'll come back to it..after I create one in DVD_Lab_Pro. Tonight, I'm burning a 'test' simple just the video+ that DTS audio track..to make sure the audio/video sync. I've also found and started downloading that .mp4 file...is the english audio 5.1? Stamped..pressed? hmmmm, learn something new everyday...thanks! so (factory-hollywood) dvd's have pitts& groves and "burned" dvd's the dye color changes...but the same laser reads both "formats"???hmmm. hell, I thought they both had pitts&groves..