You are in luck. I am pretty sure I have used my Summasketch II with ACAD 2004. It's hard to be positive since I have several digitizers. Right now am using a Summasketch III The drivers are built into Win XP I think. You might want to check out a program called Virtual Tablet Interface. It is not really necessary for use with Autocad but it enables me to use my digitizer for all my software including Word, Excel, WordPerfect, Windows Explorer, you name it. I just hate the way it is so hard to get the cursor exactly in position using a mouse, especially with high resolution where the icons are small.