Printer sharing

I am running Windows XP Professional on my computer at home and My printer is connected to it. HOw in the world do I share my printer with other computers running windows 98 and NT 4.0.
I have turned off simple file sharing, I have added the user to the XP system as an administrator. The printer is shared with full permisions to everyone that uses it, all workgroups are the same, I can see each user in the network neighborhood, When I try to add the printer from another workstaion it ask for apassword. I have no passwords on anything. I am not the only one I know having this problem. there are others that are having this problem too and they all work with and around computers and networks all day like me. We are all baffled? Help.