I dug my old plotter out of storage this morning and am trying to get it to talk to my upgraded OS... Windows 7 - 64 bit. I see that HP no longer cares about me... hardware not supported. I imagine there's been a lot of Cad Managers and IT people at architectural and engineering firms that have run into this problem when they upgraded operating systems to accommodate the use of Revit. Any suggestions for where to get the driver I need?