I am creating a DLT from a replicated DVD-5. When I import the VIDEO_TS into GEAR, it shows the start sector for VIDEO_TS.IFO at 635. I've never fully understood the importance of the start sector or if it has any importance with regard to the DVD spec. When importing it into GEAR, should I change the start sector to 640, or just leave it as 635? I know when you use the spreadsheet calculator, you're supposed to make the start sector 640.