However, we used easier way with a pre-prepared installation image called iATKOS L2, that includes Mac OS X Lion and other utilities, patches as well as hardware drivers that allows users to install Mac OS X. Advanced users can use original DVD with special boot loaders and test optimal settings for the best Mac OS X performance. They are few ways how to install Mac OS X to virtual machine. It has very straightforward installation without any complex settings. You can download free VirtualBox installation package from Oracle website.
How to install Mac OS X Lion to VirtualBox Step 1 - Install VirtualBox to your computer