I've followed the guide which they've typed out on their website for disk burning, but Disk Utility always fails the burning process. When I tried burning it on high speeds (4x~8x), it gave me an error saying that this particular disk drive could be incompatible, or the speed may be too much. Then I tried on the lowest speed possible (2x), and it gave me a medium write error. The DVD is a DVD-R from Maxwell with 4.7 gigabytes of recordable memory. It's labelled on the disk that it can be used both for video and data; so I'm assuming that an iso should work just fine with no issues. If anybody could tell me how to burn Ubuntu on these DVD-R's, that'd be swell. Thanks a ton in advance!