First I'm not sure my computer can handle the VirtualBox and Windows 8 phone emulator because there is no button for the run emulator.
Is there a certain requirement I need to run the emulator for Windows Phone 8 and VirtualBox?
Copy the Flash.vhd from an installed Windows Phone 8 SDK and use it as the virtual disk in VirtualBox with the guest configured for Windows 8. It works for me with a Mac host, but I have an invisible mouse pointer so interaction is difficult.