This is the latest twain driver and installer for the PDC640 and Windows 95, 98, 98SE, ME, 2000, or XP Home. Polaroid released it on 06/07/01 and I downloaded it from their site on 01/11/02. Just download the file to your desktop and run the program. Don't use this driver for the Fun!Flash 640 and the PDC 640 CF they have their own drivers. Since Polaroid's financial troubles came to a head you might have trouble getting onto their customer support site, which for the time being is here www.polaroid.com/service/software/index.html.