I have a powerbook and Airport express. I'm trying to hook up an HP Deskjet 3900 to it and I can't get it to show up! When I plug it in directly to the USB on the powerbook everything works fine. Then when I plug it in to the Airport and click on add in the print set up utility it will show the printer and that it is located on the Airport but it wants me to select a printer driver in the "Print Using" menu. It does not show my printer... and the driver that is being used when its plugged in using USB does not show up. Help! P.S. I had a similar problem with my old printer and the only way I got it to work was to go to a backed up version of my system. I have repaired permissions several times with no luck. Thanks!