AirPort question

[Scott Howell]

Folks, got a question. I recently was looking for a way to make it  
possible for my Macs to connect to my AirPort Extreme automatically  
upon login. I spoke to Apple Care on this extensively and what we  
ended up doing was to delete any and all connections my Macs had  
previously connected to in order to force it to connect to the only  
network available. Does anyone know of a means to accomplish this  
without having to remove those additional networks? I doubt it as he  
did a fair amount of research, but I'm curious. This idea was to make  
it easier for my wife so she wouldn't have to type in the shared key  
each time she logged in.
Any thoughts appreciated.

Scott