How many user accounts do you have? In workgroups, to ease sharing, you can make a duplicate of every account name and password on each computer. So if you have 20 users, you have 20 local accounts on each computer (you can make them limited accounts). Then when each person connects to the other computer, it passes their own credentials and connects without prompting for a password. The big downside to this is that each time any user changes his or her password, they have to change it on every single machine. This works OK with 3 or 4 computers, but gets very cumbersome with 20 computers.