Connecting to a remote printer

I was trying to connect to a printer that is shared on a computer that has
Vista to another computer that also has Vista. I am using a wireless
connection within my home. I have had no problems with connecting the
printer to computers that have XP but I had a problem with the Vista
machine. I tried adding the printer using the full name with the Add
Network Printer tool and connecting using the Map Network Drive tool. I
could not establish a connection as each attempt returned a remote server
could not be found. The file sharing center was turned on.
The only way I was able to do it was to go to Run then \\computer name\ and
then navigate to the shared printer.

My question is how do I do this in Vista? The Computer with the shared
printer is on a Workgroup but the other was not. In fact when I tried to
view the computers on the network the Workgroup could not be seen. I can
see everything on the XP machines.

Thanks

Jim