Posted 06 January 2010 - 09:28 AM
I've been working on setting up something that sounds similar to what you describe recently, so I'd say you should probably Google the topic to get good details and instructions, I know you can find info on it.
Off the top of my head though, you'll need to make sure every computer belongs to the same workgroup, has file sharing enabled, and is connected to the network. You'll need to set the specific folder(s) you want to share within the workgroup so that they can be shared. You may also have to turn off Windows Firewall, but check to see if you can share files first before doing that.