http://cdn3.pcadvisor.co.uk/cmsdata/features/3368970/Dual-booting_your_Mac_with_Windows_7_and_OS_X.png
(Your link was broken.)There is the Macbuntu[1] project, though the [most of the] graphics that come with it are copyrighted by Apple.
[1] http://sourceforge.net/projects/macbuntu/
