They stop on kernel startup when trying to boot the CentOS 5.2 boot CD. It is during ACPI. Fedora 10 Live will not but up either. I am using Fedora 9 from Live and DVD Install to teach a fall class and it works fine.
Are the CentOS and fed 10 DVDs of a similar type, and different to the DVD you used with fed 9?
Or is your CentOS on CDs?
A common problem I have is that some DVD drives really don't like some brands of disc. Some have issues with DVD-R's, some have issues with DVD+R's, some seem to be completely random.
ymmv, but if the failing discs are the same brand, it's probably your cheapest quickest solution to reburn on a different brand and see if that helps.