LogJammer

So I want to set up an older PC here as an Instructor Station and am ready to purchase another copy of XP 10, but before I take the plunge, I want to determine how small of a setup I can install as the computer will not be used at all to fly or, view flights in. So my question is, how much can I *not* install and still have the Instructor Station work? Does the IOS pull any info from the Master, such as Aircraft Available, or list of Airports? I appreciate the help and will further explain if necessary. Thanks. Justin