I've got a physical installation of Mac OS X 10.6.8 (Snow Leopard) happily running on my MacBook Pro. I want to move this install (not install a fresh copy of OS X and moving my data, move the extant OS) into a VirtualBox instance so that I can upgrade to Mavericks, but still keep backward-compatibility with several old apps that require Rosetta to run.
Is this possible to achieve? If so, how would I go about it?
EDIT: To be clear here, I do not want to install a fresh copy of OS X into the VM, I want to move my current copy with its various customizations (installation of Homebrew, Shellshock patches, upgraded version of system Python, etc). Effectively cloning my drive into the VM, if possible.