Start your VM and it will boot from the CD image. Work through the Express CD installer in the usual way, entering the install code that the amahi Amahi control panel gave created you earlier. You will be asked to reboot a couple of times during the process. (During the first reboot you will have to disconnect the Express CD iso image, otherwise you'll get back to the installer menu.)

Eventually, the console should show a text login prompt. At which point you should shut down the VM (, either by sending the shutdown signal from VirtualBox or log in and issue the '''shutdown''' command).