[Headly]

Should be as simple as clicking on the drive with the disc and selecting "build global image", this you already know. Use the min speed until you get things working then use whatever works. Min will still be needed for scratched or damaged discs. After the image is built select "image" from the options at the top. Then select your image. Burn at slowest speed possible. Other possible suspects could be the media you are using. A lot of major brands, like memorex, suck. Ritek are about the best and cheapest out there. Also if you have a version 1-4 it is possible that your laser is dying and cannot read dvdr. If cd-r backups work but not dvd-r then this is probably the case.