Have you tried booting with the no "nomodeset" parameter? That normally sorts out issues with getting black screens.
EDIT: That issue you are having with the vanilla Ubuntu install sounds familiar to me. I think I had a similar message when the Lubuntu installer kept crashing. It turned out to be down to the slideshow that comes up. You could try booting the disk into the "try ubuntu..." option, open a terminal then type:
That may then allow you to get through the installation process.
sudo apt-get remove ubiquity-slideshow-ubuntu