Is every computer equipped with Windows 7? If so is, there's a way to configure a shared map available for every computer connected to the network to access. If the entire drive is to be accessible, this is problably not the solution you are looking for.
Would you rather set up a network with a mainsystem used for storage the other computers are constantly connected to?
This answer isn't really what you are looking for, I'm just trying to help the professionals with supplying eventual info about your requirements they need to help you out