Separate names with a comma.
Win 7 has the option 'Run as...' or similar which you would get from right clicking the installer. It allows you to run the installer as the...
Ubuntu is rather important over here. Yeah I know, bleeding edge is begging for it, but Ubuntu is kind of mature and it just seems to be something...
This could even be an option when creating new VM's. -Use a descriptive icon for the VM that correspond to the guest OS?