We can't discuss the how-to here, but we can discuss the legality. I didn't say that it was a good policy, nor that it's illegal. I said it's a violation of the License which can be read in this PDF document:
To quote: "You agree not to install, use or run the Apple Software on any non-Apple-labeled computer, or to enable others to do so."
And regarding legal jurisdiction: "This License will be governed by and construed in accordance with the laws of the State of California, as applied to agreements entered into and to be performed entirely within California between California residents."
I'm no lawyer, so I don't know how the law affects those who violate an agreement between California residents. However, anyone attempting this should be aware of the terms (and now they are). I was curious about the use of Windows under Wine. According to Wikipedia, Microsoft has not declared it illegal or cracked down on Wine users. They just try to prevent WGA and Windows Updates from working: