This graphics driver is an updated driver for the Matrox Millenium genre of card. It allows for multiple display support for Windows NT 4.0. It's a self-extracting zip file and install into a directory where it creates two sub-directories - dsk01 and dsk02. Simply run the "setup.exe" file from this directory when it has extracted and it will install the graphics driver. It also installs Matrox PowerDesk NT on your menu to allow you to set the conditions for multiple displays.