We have quite a few hp printers and I noticed now they all use the HP Universal printer driver which I added to the printer server (2003 serveR) but when someone on win7 64 bit tries to install the printer they still get an error that says no driver was found on the server for this printer.
I don't have any problems with our canon's and Dells but they supply a driver for each model unlike hp who is going to this universal driver route which frankly I don't like.