Hi! I've just got a MacBook and I love it.

I would like to have installed on the same machine Mac OS, Ubuntu and Windows XP.

I think that my MacBook came with all the HD "full" of Mac OS, so I need a way to tell the computer: "OK, Mac OS installed but only in 20GB", the rest of the HD as free space to proceed with ubuntu and windows installation.

Is there any partitioner tool easier to use to do it?

Thank you very much I'm quite newbie on this world so please be slow