Setting up

Hi everyone,

I do not know what the title should be.. but I will explain the situation, I have a friend who is a dentist. He has three computers and it is located at three places at his office, meaning, he has three patient rooms one is at room #1, second is at Room#2 and third one is at Room#3. All three on same network from what I understood from what he said. It is running on XP. No internet meaning I clicked on the internet explorer and it is not working. When I went to the network connection Local Area Connection says connected and network is disabled. When I looked at it, this is what I understood the situation at his office.

Now this is what he needs,He has a dental software installed on them to take X-rays. If he takes X-rays at Room#1, it should be available on Room#2 and Room #3 if he needs it.

Can you guys Please help me with understanding the big picture if I am not right on what I explained above? And how can I set this up?

This is couple of questions I had.

1. What needs to be done or how exactly we can see X-Rays in each other computer? How does it work?
2. An internet connection is required to do that?
3. How to check the cable they connected is correct/ how exactly it needed to connect?
4. What else do I needed to do in-order to set up this?

Thank you so much for all the help. Please help me with it.
Thanks