Multiple Network connections – XP Home

I have a laptop with Windows XP Home edition. I would like to setup my user so that I can easily access my office network, that would be accessed with a NIC, my dialup ISP for when I am on the road and another office network also using a NIC.

None of the connections would be accessed at the same time so that isn’t an issue. Can I setup all three connections in a single user or would it be easier to have 3 users each with it’s own connection? Would that be the easiest way or should I just setup all three connections in a single user, if that is possible?