In the end, I couldn't get Virtual PC to install properly so I tried VMware. The space battles work on VMware, but the core game runs badly and the screen crazes up after a while. So... what I can do is play the main game in Oracle VirtualBox, and whenever there's a space battle, transfer to VMware, play there, save, and transfer back. Re: the hours. I meant including the installation, reading help screens, configuration (e.g., setting up shared drives between the host and guest machines) and debugging.