It's not really my place to question. In short, dual booting linux on a mac is tricky.
Why did you get a mac if you don't like the OS? If you got an Eee PC or some other open sourcish model for a lot less that you can put linux on it. Really the whole point of getting a mac is because it works so well because Apple makes the hardware and software. You do realise that linux and OS X are built on similar technologies, i.e. Unix/BSD etc, and that they look very similar and at the front end, act in a very similar way? Why change? I really think you should reconsider.
If you're asking questions like this...are you sure you know enough about any of this to attempt it? Are you talking about a newer mac with dualboot Windows/Mac? You've got to be ALOT more specific. Also, in times of need such as this, Google is your friend.
Also, in times of need such as this, Google is your friend.
just dual-boot it. trust me. linux isnt all that good. I prefer osx myself... but i am stuck with windows :-(
(I tried this on mine and.. Eugh...)