Let me tell you what I want to do, then you can tell me if its possible or if I should go about it differently.

I have a computer lab of 8 computers. I want to make one computer with 40 users on it. I want to have the other 7 computers be able to access any of the 40 user accounts on that single computer. All 8 computers are running OS X 10.1.5 client. So how do I do this? How can I login into any user account from any computer on the login? Is this possible?

Please don't tell me I have to get OS X server. How can I do this? I've looked extensively here and on the help guide but haven't found a thing.