I have my mac pro connected to my hp c3100 printer. It is shared, all sharing options are enabled on the Mac Pro. 2 Macbooks and an iMac cannot find or see this printer. Networking, screensharing, file transfers, they all work fine. Just can't see the printer. Is AppleTalk required to do this? Here's some screenshots from the Mac Pro. I have never tried to network a printer in Leopard, I seem to remember it was easier in Tiger.