Do you also have a MacBook 2,1? I know for example that my MacBook 2,1 does not allow booting from USB. I tried all methods but to no avail. I have Karmic Koala running on the hard drive, next to MacOSX.
I will try to follow the guide you refer to tomorrow. See if I can get it running on my MacBook 2,1. But as I said, I don't give you a lot of chance.