I have an Intel CoreDuo iMac connected to an AirPort Express (which is connected to a cable modem for high speed internet) in my living room. I use the Airport Express to access the internet from other Macs in other rooms in the house. Where's the best place for me to learn how to set things up so that the other Macs in the house can access one of the hard drives that is connected to the living room iMac via the Airport Express in the house? I know this is probably very simple, but I just don't know the best place to go to get a simple step-by-step explanation of how to do it.... Many thanks, in advance, for your help!