I have wireless internet set up at both work and home, but I must use a proxy at work to get to the internet. At the moment, my Powerbook joins whichever of the two networks it finds automatically, but if I want to go on the internet I have to switch settings by switching Locations. It's only a single menu command, but I always seem to forget to do it! Is there some way to switch Locations automatically whenever the available Airport network changes as well?