Thank you. This did not work for me. I'm not 100% sure why, but I have now found two other how-tos about this:

http://forum.netkas.org/index.php?topic=222.0
http://aquamac.proboards106.com/inde...ck1&thread=509

and so I will try those.

After I did as you said, it boots up OK but it says quartz extreme not supported and I only have one monitor still.

Thank you for writing.