When booting the operating system will not recognize the presence of the LiveCD, and you will end up with a console of initram.
I followed one tip found on Internet.
* Create an USB with the image of Ubuntu 11.10 x86_64 following the instructions on http://www.ubuntu.com/download/ubuntu/download
* Then burn a CD with the same image.
* Plug the USB and insert the CD.
* With rEFIt boot from the CD.
* When booting, the CD will be "lost" but it will continue with the USB image.
When booting the operating system will not recognize the presence of the LiveCD, and you will end up with a console of initram.
I followed one tip found on Internet.
* Create an USB with the image of Ubuntu 11.10 x86_64 following the instructions on http:// www.ubuntu. com/download/ ubuntu/ download
* Then burn a CD with the same image.
* Plug the USB and insert the CD.
* With rEFIt boot from the CD.
* When booting, the CD will be "lost" but it will continue with the USB image.
Now, I have Ubuntu 11.10 on my macbook pro 8,1.