I would love to help test 12.04 ppc-- but I have nothing to work with. The live CD image won't boot for me, the alternate cd image creates an installation which halts during boot, and upgrading from 10.04 now quits midway citing "Too many errors" and leaves even 10.04 unbootable.

Is there a way to selectively remove certain boot items from the live cd image so I can figure out what is hanging?