I am having difficulty burning Core 3 disks. I downloaded all the ISO images and have checked the md5sum and they are all good. The problem is I can only burn disk 1. The others keep failing the test. I'm using Windows XP to download and burn the disks. I've tried two different burner programs, CDBurnerXP Pro3 and the Alex Feinman ISO Recorder. The ISO Recorder worked the last time for Core 2.
By "failing the test" I guess you mean "mediacheck"?
Try entering "nocddma" as an additional option when booting from the first CD and see if that helps.
Paul.