Use DOSBox if you don't have access to DOS and are using Windows XP. As for the installation in itself, it's just as easy to install in DOS than it is in Windows, except that you have a lot more typing to do. If you have any questions about that, just ask here again.
And as for the other guest who have a mouse problem: look
here. It was sitting there for you in the troubleshooting archive, quite clearly labelled...