Wired.com has a tutorial explaining where to get the OS copy, the tools required, and installation instructions
Your wait for the Mac OS X enabled netbook is over! Knowing that they will not get a Mac netbook from the Cupertino giant, users have taken matters into their own hands and have gone ahead and installed the Mac OS on their netbooks.
Wired.com has even got a handy tutorial on their site explaining where one can get the OS copy (illegal of course!), the other tools required, and then a quick set of instructions on how to complete the installation.
However, installing Mac on a non-compatible chipset makes the USB port, Wi-Fi, and the headphone port defunct, but a workaround is also posted to swap the existing Wi-Fi chip with a Mac-compatible one.
Wired.com's writer managed to install the Mac OS X successfully on his MSI Wind netbook.